Check the fridge No Frost sensor

What to do if a fridge with No Frost doesn’t freeze or is weak?

THINK AS A COPYRIGHT MEN’S CLUB What to do if your fridge with No Frost doesn’t freeze or is weak?

Is it possible to repair No Frost fridge by yourself?? Of course, if you have at least some knowledge of physics.

So, a few weeks ago the great and reliable Whirlpool ARC 8140 refrigerator with No Frost system began to freeze badly. The freezer stopped freezing, yes, and at first there was a strange noise that sounded like a broken fan. Then the noise disappeared and it became clear that the great Virpool refrigerator doesn’t freeze at all.

If you have the same problem, don’t bemoan the compressor or anything else, the most likely reason why your No Frost refrigerator won’t freeze is this:

How the No Frost system works, and what can go wrong with it

To get an idea of how No Frost works, you have to remove the shelves from the freezer and the rear wall lid.

It’s essentially a radiator. It’s cooled by liquefied gas pumped through it by a compressor motor.

The fan in the top draws air from the compartment and blows it through the evaporator, then it distributes it throughout the entire compartment and cools whatever is in it. In some “no-frost” models the air flow can be directed from the freezing chamber to the refrigerating chamber. The process is then controlled by an automatic damper. Flow through duct at top.

The air then travels through the cooling chamber and returns to the freezer compartment via the lower duct.

NO FROST Refrigerator Timer wiring and series checking

Every time the freezer door is opened, air masses are exchanged. cold air flows out of the freezer compartment and is replaced by warm and humid air from the room.

Moisture from the air is deposited on the cold evaporator where it cools down enough to turn into ice. Excessive ice formation interferes with normal airflow circulation and refrigerator operation. To avoid this, a heating element is installed underneath the evaporator.

Heating element turns on approximately every 16 hours of compressor operation. The heating element melts the ice and the moisture drains out through the drainage hole.

Problems of No Frost refrigerators

The most common malfunction of refrigerators with automatic defrost is frosting of the evaporator. As we spoke, ice interferes with normal air circulation that leads to temperature increase in a freezing chamber. Possible causes:

For system diagnostics it is necessary to check all connections up to the connector near the fan. Typically, the wire runs from the heater along the side of the evaporator to the fan at the top of the freezer.

Samsung zero frost fridge repair with your own hands

Samsung No Frost fridge no cold

Before to proceed to repair of this refrigerator, it is necessary to understand that system No Frost represents, here it is necessary to notice that practically all units with such type of defrost, is repaired equally. In translation from English No Frost. means “No Frost”, that is as many say. dry freezing. The principle of operation is that the fan blows the freezer evaporator, makes forced air circulation in the refrigerator and freezer, to put it simply, the same principle as in the air conditioner. The owners of air conditioners know that the water constantly drips from these household appliances, that is the condensate drips from the freezing radiator, and here begins the difference. If in conditioner the system is open and when it stops the work this frost melts at the expense of external temperature, in refrigerator no frost the role of heater is played by defrosting fan that turns on after certain set time of the engine work. In the photo on the right, you can see the icing on the freezer evaporator, it is a result of improper work of the defrosting system, as a result, due to such ice on the freezer, the refrigerator compartment is not cold, and if there is much ice, the freezer compartment will also lose its frost. So, little by little, we come to the subject of repairing Samsung No Frost refrigerators. Further we will consider the breakages and the ways of their elimination in refrigerating units with electronic and mechanical defrosting system. The only thing, to all of the above, I would like to add the following. In refrigerators with system zero frost irrespective of that Samsung or other brand, Freon leak occurs extremely rare and without the master, with this problem it is impossible to cope, therefore further we will consider breakages connected with electronics and mechanics

Repair of Samsung Zero Frost with mechanical control

First of all I would like to talk about icing on the freezing evaporator. It often happens that in the refrigerator compartment has become warm, but in the freezer compartment, the food is frozen as if nothing has happened to the refrigerator. In contrast to weeping system, in No Frost refrigerators there is only 1 evaporator and thanks to the fan the cold air is blown into the refrigerating compartment, that is in these refrigerating units, all nuances of repair are connected only with a freezer, namely the temperature in the refrigerating chamber depends on it. I will now answer the frequently asked questions, my customers, I think this will greatly clarify many points related to malfunctions and breakdowns

I have a Samsung two-chamber refrigerator, worked for over 5 years, without a single failure. Last defrosted 2 or 3 years ago. Just recently, stopped cooling the upper chamber where the main products are, the freezer is fine, all the food is frozen, as before. There are no normal masters in the area, as we live in the outskirts of town, 80 km from the district center. The repairman who services our village said there was a freon leak and we had to take the refrigerator to the district center. We tried to defrost the refrigerator, we left it with the doors open for 24 hours, but when you turn it on, the situation was repeated. there is no cold in the refrigerator compartment and everything is normal in the freezer. After surfing the Internet, I learned that the Freon leak in No Frost, happens very rarely and that no odor can be heard. Do you know if we should just change the thermostat or some other part?

In order to determine if there is Freon leak in Samsung fridge or not it is necessary to do two simple things. Firstly try the sides of the fridge, if they are hot, for sure there is no leak. Secondly, to defrost the refrigerator and here many make a big mistake, and now I will tell you what it is. It is necessary to defrost such fridge units not in 12 hours and not in 24 hours but in minimum in three days and only then turn on and look how the refrigerator will work. If after two-three hours the refrigerator does not reach the prescribed temperature, then it is possible to speak about a leak or clogged capillary. By the way a leakage of coolant in these refrigerators is very rare, in most cases the problem is in a faulty defrost sensor or timing mechanism. see photo 2 and 3. These are the parts we will deal with

How to check the timer and defrost sensor of the Samsung refrigerator with mechanical control

You can check the timer directly on the fridge. To do this you need to do the following. There is a knob (selector) on this clock mechanism, it can only be turned clockwise. Firstly, disconnect the refrigerator from the power supply, turn the selector clockwise and you will hear a click, this click means that the timer has started defrosting. Turn this selector clockwise again, until just a little to a click. switch on your fridge, in 20-30 minutes it should switch off, at that you should hear a click, that means that your fridge has hit defrost mode. Defrost mode lasts for about 30-40 minutes, i.e. after 30-40 minutes the fridge should turn on, if it does not happen within an hour or 2 then the timer is useless. It should be noted that in 90% of cases, such a check does not mean that the clock mechanism is faulty. The thing is that during the test it can show absolute operability, but in the work will be glitchy

Timer for Samsung refrigerator

How to check the sensor defrosting Samsung refrigerator

Defrost sensor in a no-frost fridge is located on the freezing evaporator, in order to get to it you have to remove the front panel. Below I’ve made a video that explains in detail about repairing a Samsung no frost fridge with mechanical defrost system, but first let’s see how the defrost sensor works. When the temperature in the freezing chamber decreases, contacts of the sensor get closed, and after the timer gets in defrost mode, the heating element, that is the heating element, through the sensor gets voltage. After the heater has heated the evaporator, the defrost sensor opens its contacts and the heater stops working, but the clock mechanism starts working. That is, the defrost sensor is a kind of current switch, from the heater to the timer. Here it is necessary to understand, I will now enumerate, that will be if the sensor of a defrost will incorrectly work

How to check the defrost sensor of the Samsung refrigerator

Before to proceed to repair of this refrigerator, it is necessary to understand what system No Frost represents, here it is necessary to notice that practically all units with such type of defrosting are repaired in the same way. In translation from English No Frost system means “No Frost”, that is as many say. dry freezing.

The principle of action consists in that the fan blows the freezing evaporator, making forced air circulation in a refrigerating and freezing chamber, to put it simply, the same principle as in air conditioner. Owners of air conditioners, know that with these household appliances, constantly drips water, that is from the freezer radiator condensate flows down, here begins the difference.

If in air conditioner the system is open and when it stops the work this frost melts at the expense of external temperature, in a fridge no-frost the role of heater is played by defrosting fan which is switched on after certain set time of motor work.

In the photo on the right, you can see the icing on the freezer evaporator, it is a result of improper work of the defrost system, as a result, because of such ice on the freezer, the refrigerator does not cool, and if there is much ice, then the freezing compartment will lose its frost. That is how little by little we came to the topic of repair of Samsung No Frost refrigerators.

Further we will consider the breakdowns and ways to fix them in refrigeration units with electronic and mechanical defrosting system. The only thing, to all of the above, I would like to add the following. In refrigerators with system no frost no matter what brand it is Samsung or other, freon leak is very rare and it is impossible to cope with this problem without a master, therefore further we will cover failures related to electronics and mechanics

Repair Samsung Zero Frost with mechanical control

First of all, I want to talk about the icing on the freezer evaporator. It often happens that the refrigerator has become warm, but in the freezer compartment, the food is frozen as if nothing has happened to the refrigerator.

Unlike crying system, in No Frost refrigerators there is only one evaporator and thanks to the fan the cold air is blown into the refrigerating compartment, that is in these refrigerators all the nuances of repair are related only to the freezer, the temperature in the refrigerating chamber depends on it.

I will now answer the frequently asked questions, by my customers, I think this will very much clarify many points related to malfunctions and breakdowns

I have a Samsung two-compartment refrigerator, worked for more than 5 years, without a single breakdown. Last defrosted 2 or 3 years ago. Recently, the upper chamber where the basic foods are located stopped to be cool, in the freezing chamber everything is normal, all foods are frozen as before. No normal mechanics in the area, as we live in the boondocks, 80 km from the district center.

The master who serves our village, said there was a leakage of freon and must take the refrigerator to the district center. We tried to defrost the fridge and we left it with the doors open for 24 hours but when we turned it on the situation repeated itself. there is no cold in the fridge compartment and everything is fine in the freezer. After surfing the Internet, I found out that a Freon leak in No Frost is very rare and there is no smell.

Can we just change the thermostat or some other detail?

To determine whether there was a leak or not freon in a fridge Samsung Nou Frost, it is necessary to do two simple things. Firstly try the sides of the fridge, if they are hot there is probably no leakage. Secondly defrost fridge and here many make a big mistake and now I will tell you what it is.

To defrost such units, it is necessary not 12 hours and not 24 hours, but at least three days and only then include and watch how the refrigeration unit will work. If after two or three hours, the refrigerator does not reach the temperature prescribed, then we can talk about a leak or a clogged capillary.

By the way speak, refrigerant leakage in such refrigerators is very rare, in majority of cases the problem is in a faulty defrost sensor or watch mechanism. look photos 2 and 3. With these parts we will deal

How to check the timer and defrost sensor of the Samsung refrigerator with mechanical control

You can check the timer directly on the refrigerator. For this purpose it is necessary to do the following actions. There is a thumb wheel (selector) on this clock mechanism, it can only be turned clockwise. First of all disconnect refrigerator from power supply, turn selector clockwise and you will hear a click, this click means that timer started defrost mode. Turn again, this selector clockwise, to the point, just a little bit to the point of clicking.

Turn on refrigerator, in 20-30 minutes it should turn off, thus you should hear a click which will mean that the refrigerator has hit defrost mode. Defrost mode lasts for about 30-40 minutes, that is after 30-40 minutes the fridge should turn on, if it does not happen within an hour or 2, then the timer is useless. Here it is necessary to notice such thing, that in 90 %, such check does not mean, that the clock mechanism is normal.

The thing is that during the test it can show absolute operability, but in the work will glitch

Timer for Samsung refrigerator

Testing and Replacing a GE Defrost Sensor. WR55x10025

How to check the defrost sensor of Samsung fridge

Defrost sensor in fridge zero frost is on the freezer evaporator, in order to get to it you have to remove the front panel. Below I have made a video, which details the repair of Samsung fridge no frost with a mechanical defrost system, but first let’s see how the defrost sensor works.

At decrease in temperature in the freezing chamber, contacts of the sensor close, after hit timer in a defrost mode, on a heating element, that is the heating element, through the sensor voltage is supplied. After the evaporator heats the evaporator, defrost sensor opens its contacts and the evaporator stops working, but the clock mechanism starts working. That is the defrost sensor is a kind of current switch, from the heater to the timer.

Here’s where you need to figure it out, I will now list what happens if the defrost sensor does not work properly

Refrigerator Defrost Timer Repair. costs in Saint-Petersburg

What to do when your fridge is out of order Repair it yourself? No way! Let professionals solve this problem. Having called the expert in repair of refrigerators, you receive service in the house. No need to go to the workshop, to transport the bulky equipment. the service is provided in the place of operation.

Self or professional repair?

Wondering if a technician can solve the problem? Our specialists can solve any problem. No matter what the nature of the malfunction is. Your refrigerator will be up and running in no time. And our specialists come quickly, because they serve the areas in which they live.

Repair or throw away?

You are going to throw your refrigerator away because it is not working? If you have not been able to identify the reason why the equipment has stopped working, this is not a reason to take it to the waste collection site. In addition, by law, such devices require special disposal, which means there is a risk to get a fine for violating the established norms or will have to call a special service. We recommend that you do the opposite. consult with a handyman.

The history of our treatment of refrigerators prompts us how to correctly eliminate the main damages of appliances, taking into account the principle of operation, the design features of appliances and manufacturers’ recommendations. This allows us to work not only efficiently, but also quickly. This approach allows us to provide quality service to our customers while saving valuable specialist time. As a result our repair costs much less than other companies.

Beware of the excessive price of our service? No need to worry. We work transparently and honestly. Check our price list beforehand and save!

It is not possible to repair the fridge on the spot? Then take advantage of one of our workshops. Rest assured that you will be served no worse than in any major service center.

Breakdowns of fridges we normally handle

The most common variant. the customer does not know what caused the failure. The machine can keep working all the time but there is always a puddle under it or next to it. Not understanding why it happens so, people address to us. After all we are ready not only to repair the refrigerator but also to explain everything: why it broke, what was done “wrong”, how to act in order to prevent the situation from repeating in the future.

Errors, light bulbs, switching off

Also the widespread problem. the refrigerator switches on and then soon shuts down. It is clear that it is impossible to tolerate such a thing. Or, for example, a red light comes on. This signal requires a reaction, but not always the user understands what exactly should be done.

After all, even knowing the refrigerator error code, it is not always possible to determine the cause of its failure. And not all the faults can be eliminated at home. Therefore it is still worth to apply to a service center.

Problems with the freezing chamber

This is also relevant if the upper chamber has stopped freezing (in the corresponding modification of the technique). After all, this part is very important for the average person. The freezer is used to store food for stocking. And if they defrost, they either go bad or need to be used.

Since the volume of modern chambers is quite large, a large number of products are at risk. Our masters repair freezers as quickly and efficiently as refrigerators. For this purpose it is necessary to carry out diagnostics.

It will allow to determine the reason why the refrigerator stopped freezing.

We can:- replace the evaporator;- repair the fan;- restore the motor.

If you try to fix the problem on your own, it is unlikely you will even be able to determine the cause. That is why you should not postpone solving the problem in this way. If the freezer does not work or there is another malfunction, it is necessary to call as soon as possible for diagnosis.

All appliances can break down

Problems can occur in refrigerators from a wide variety of manufacturers. For example, even the well-known brand “Atlant” can fail: the chamber does not freeze or the whole appliance does not work. There can be a variety of causes. Most malfunctions are caused by improper operation. Sometimes you can get by with replacing the temperature sensor or thermostat.

Damaged, bloated wall

There can be other problems. For example it is possible to damage mechanically some part of a refrigerator. In this case, the importance of repair is determined by the nature of the damage. Quite often we are addressed when the wall of equipment swells. This problem frightens the users, therefore they try to call in repair shop at once: 344-44-44.

Is heats up, suddenly stops freezing

There are several other typical malfunctions. For example, a fridge can simply heat up. And the reasons are often not obvious. Can’t do without professional diagnostics. Sometimes the equipment suddenly defrosts. Most likely the reason is disconnection of the refrigerator compressor. Naturally, in such a state, it stops freezing. However, you should remember that there is a solution. contact the service center “Lenremont”.

Deformation of the seals

As you know, during operation, the refrigerator is only turned on periodically to maintain the set temperature. However, there is a variant of failure, in which the technique works all the time, does not turn off. It may have broken its seal. The main probable cause. problems with the seal. It may be damaged or peeled off. It is also recommended to get acquainted with the manufacturer’s advice, given in the instruction manual.

It doesn’t turn off

Repair or repair of seals may be necessary. However, the material does not always allow it to be treated. In such cases, the gasket is replaced.

At first sight it may seem that this procedure can be done by yourself. However, it is still worth using the services of specialists to achieve the necessary tightness.

After all, this is the only way to get a guarantee that your refrigerator will continue to work efficiently. You will save your energy, time and money.

Repair of Indesit No Frost refrigerator with defrost timer

Refrigerators Indesit No Frost, in which there is an electronic timer of defrost and a mechanical sensor of defrost, have recommended themselves not only with reliability, but also with simplicity of repair. I will not pull the cat by the tail and at once will begin to tell that it is necessary to do if your refrigerator refused to work normally

No cold in the refrigerator compartment

I shall note that I now tell about full No Frost, if at you refrigerator with mixed system, that usually such problem arises because of leakage of freon (refrigerant) on weeping evaporator which is behind a plastic on back wall of a refrigerating chamber, about it you can learn here. Let’s return to our rams and find out why the cold in the upper compartment is missing. Usually this breakdown is due to ice on the freezer evaporator, so the first thing you should do is get to the evaporator and see if there is ice on it. If it’s completely covered in snow then you have only one conclusion: The defrost system doesn’t work correctly or the coil of the defrost heater is broken. Now we can list in order the actions that you must do

  • Check the defrost heater→ You should measure the coil resistance of the defrost heater, it should be about 300/400 ohms, if the coil is not broken, then proceed to the second step
  • Fuse and thermostat→ On Indesit No Frost refrigerators, the defrost sensor is designed in such a way that the fuse and thermostat are located in it, this is the part you need to change. To check this sensor, quite simply, at room temperature contacts will be in breakage, and if you throw it into the freezing chamber in which the temperature is lower.10, then the contacts will short out. That would be all right, but often a seemingly working part can glitch when working on a refrigerator, so it’s better to change
  • Electronic defrost timer→ Although many people say you can check it, I will tell you this, don’t bullshit, in this case you have to change it just like the defrost sensor, this way you save your nerves
  • Flap valve→ This is a kind of thermostat that regulates the temperature in the fridge compartment. It fails very rarely, in my practice changed only a few times and that due to mechanical damage. Is located in the refrigerating compartment, if you open the fridge compartment you will see the knob for adjusting the cold, just behind it there is this thermostat. The flap only needs to be looked at if the freezer is at a normal temperature and there is no ice freezing on the freezer evaporator

You’ll be surprised, but this is the end of the troubleshooting, that is, in this case you should just change the defrost sensor and the electronic timer. Only it is not necessary to save money, it will come out on the side, certainly if you do repair of your refrigerator it is possible to replace timer at first, and then a sensor. Simply these parts are very difficult to check and as I have already written above, seemingly working part can malfunction on the unit itself

No frost in the freezer

In this case all is much worse and more difficult, if you faced with this problem it is better to address to the qualified technician, in fact the problem can be connected not only with freezing, but also failure of the temperature regulator, start relay of the engine, the compressor and as happens a leak of refrigerant. Now let’s see what signs indicate a malfunction of this or that part

  • Thermostat → Fails quite often, usually stands “there 145”. The signs of failure of the thermoregulator are as follows: The refrigerator does not start or remains idle for a long time. There are 3 pins going to the thermostat, try shorting them together and see if the motor starts or not. If the compressor began to work and the refrigerator began to gain the desired temperature, you need to replace the thermostat
  • Engine start relay and the motor itself → Burns very rarely, the only thing that can burn out in this part is the posistor. The posistor is in the form of a tablet and is inside the relay. You should listen to the engine starting, if it does not start or starts, and in 20-30 seconds it shuts down, then I doubt you can help. The thermostat has 3 pins and try to short-circuit them with one another and listen to it if it starts working or not
  • Freon leak or clogged capillary → Let masters forgive me for what I call freon, common people do not understand the terms, and the article is written for them. It is defined rather simply, if there is no cold in the freezing chamber and there is no ice on the freezing evaporator, and at the same time the motor does not switch off, in this case you can safely speak about a clogged capillary or a refrigerant leak. You can also touch the condenser on the back of the fridge. it’s an iron grill with tubes running through it, usually black. If this condenser is cold, then do not hesitate to call a master. it is necessary to charge the refrigerator with freon

or less solved all the basic problems of the refrigerator, which has a defrost timer, now we can proceed to the second step, namely to answer the frequently asked questions that sound on my YouTube channel

I have an Indesit No Frost refrigerator, it’s about 10 years old. In general, the upper chamber, where the main products are, stopped working, the freezer is also slowly dying away. We were advised to turn the fridge off for a few days, we did and both chambers started working fine. After about 2 weeks the situation repeated itself, that is, the refrigerator compartment began to work badly, or rather, in it at all lost the cold, and then the freezer compartment also began to freeze worse. I watched your video on YouTube, checked the defrost sensor and the evaporator, they worked, so I came to the conclusion that the timer is defective. Of course, I replaced it, but the problem is still there. What do I do next

I mentioned in this article that if the fridge compartment doesn’t work but the freezer compartment does, you need to replace two parts. the sensor and the timer, don’t be greedy. These are the parts that are responsible for the proper operation of the heater, that means you also need to replace the defrost sensor

Repair Samsung Zero Frost with mechanical control

First of all I want to talk about icing on the freezer evaporator. It often happens that in the refrigerating chamber became warm, but in the freezing compartment, the products are frozen as if nothing has happened to the refrigerator. unlike crying system, in refrigerators No Frost, there is only one evaporator and thanks to the fan the cold air is blown into the refrigerating compartment, that is in these refrigerating units, all the nuances of repair are related only to the freezer, the temperature in the refrigerating chamber depends on it. I will now answer the frequently asked questions, my customers, I think this will greatly clarify many points related to malfunctions and breakdowns

I have a Samsung two-chamber refrigerator, worked for more than 5 years, without a single breakdown. Last defrosted 2 or 3 years ago. Just recently stopped cooling the upper chamber, where the main products are, in the freezer is fine, all the products are frozen, as before. There are no normal repairmen in the area, as we live on the outskirts of town, 80 km from the district center. The repairman who serves our village said that there was a leakage of freon and the refrigerator had to be taken to the district center. We tried to defrost the fridge by leaving it with the doors open for a day, but when you turn it on the situation repeated itself. there is no cold in the refrigerator compartment and everything is normal in the freezer. By surfing the Internet I found out that freon leakage in the Know Frost fridge is very rare and there is no odor at all. Do you know if we should just change the thermostat or some other part?

In order to determine whether there is a leak in your Samsung fridge No Frost or not, you need to do 2 simple things. Firstly try the sides of the fridge, if they are hot then for sure there is no leakage. Secondly defrost fridge and here many make a big mistake and now I will tell you what it is. It is necessary to defrost such fridge units not in 12 hours and not in 24 hours but in least three days and only then to turn on and look how the refrigerating unit will work. If the fridge is not at the right temperature after 2 or 3 hours, then you can talk about a leak or clogged capillary. By the way, refrigerant leakage in such refrigerators is very rare, in most cases the problem is in a defective defrost sensor or timer mechanism, see photos 2 and 3. These are the parts that we are going to deal with

How to check the timer and defrost sensor of a Samsung refrigerator with mechanical control

You can check the timer directly on the fridge. To do this, you have to do the following. There is a thumb wheel (selector) on this clock mechanism, it can only be turned clockwise. First of all, disconnect fridge from power supply, turn clockwise the selector switch, you will hear a click, this click means that timer started defrost mode. Turn this selector clockwise again, until just a little bit before it clicks. Turn the fridge on, in 20-30 minutes it should stop and you should hear a click which will mean that the fridge has hit defrost mode. Defrost mode lasts about 30-40 minutes, that is, after 30-40 minutes the refrigerator should turn on, if it does not happen within an hour or 2, then the timer is not good. The thing to note here is that in 90%, such a test does not mean that the clockwork is working properly. The thing is that during the test it can show absolute operability, but in the work will be glitchy

Timer for the fridge Samsung

How to check the Samsung fridge defrost sensor

Defrost sensor in a fridge no frost, is on the freezer evaporator, in order to get to it, you must remove the front panel. Below I’ve made a video detailing how to repair a Samsung no frost refrigerator with mechanical defrost system, but first let’s see how the defrost sensor works. When the temperature in the freezer compartment decreases, the sensor contacts close, after the timer gets into defrost mode, the heating element, that is, the heater, is energized through the sensor. After the evaporator has heated up, the defrost sensor opens its contacts and the evaporator stops working, but the clock mechanism starts working. That is, the defrost sensor is a kind of current switch, from the heater to the timer. Here’s where we need to figure it out, I’ll now list what happens if the defrost sensor does not work correctly

  • Defrost heater won’t turn on, as a result of this there will be ice on the freezer evaporator and this ice will accumulate to the point where the fridge just won’t turn off or defrost properly
  • Refrigerator will not turn on, it happens in the case when the temperature rises, that is, when defrost works, the sensor does not switch to another mode

It is practically impossible to check the defrost sensor for 100%, the same way as the timer, i.e. its check can show that it absolutely works, but it does not guarantee its workability in the process of refrigerator operation. I can say from practice, I always change everything together, that is, I take the sensor, take the timer, the fuse against overheating and just throw it away, and in place of all these parts I put all new. Believe me after 5-6 years, all the mechanics of such units, just falling to pieces, so there is no need to cheat and greedy

Defrost sensor of Samsung fridge no frost

Defrost heating element for Samsung no-frost refrigerator

Watch video about repair of the fridge Samsung zero frost with mechanical defrost system

After we got acquainted with some of the details of this refrigerator, we can summarize. In 90% of cases, the cold and frost disappear as a result of improper defrost heater operation, which leads to icing of the freezer evaporator. In general if in your refrigerator the cooling compartment stopped cold, turn off the aggregator for three days, don’t forget to open doors both in this and in other chamber. Then start it up, if it gets cold as it should, first of all, check the defrost heater, if it’s okay, change the defrost sensor and the timer. I haven’t said a word about parts like the fan and the thermostat. Failure of these parts is very rare, the video above has information on this, I recommend watching. Article just turns out so much and about these details should tell a long time, I think on this subject will write another article

Why is there a lot of ice on the freezer evaporator of LG No Frost refrigerator

There could be several reasons for this, but first of all check the defrosting fan located on the freezer evaporator. You can check it with multimeter and ordinary wires, resistance of heating element may be different and frankly speaking I practically never pay attention to it, for me it is important that the coil is not at breakage

Recently, my LG No Frost refrigerator (the freezer is on top), stopped shutting down. I disassembled the freezer and found a large accumulation of ice, and checking the heater showed its fault, it did not call. I work as an electrician and I think I can change it, but surfing the internet, I did not see defrosting fan for my model. I have the question if it is possible to replace any other heater, because as I understand the main thing that it heats the evaporator, that is, the condensate flowed into the channel for water drainage

The main thing that it fit the mounts, that is, sat in the sockets where the old one was. They are practically all the same in terms of power, I never pay attention to it. As for the wires, they can always be redone. In the video below, I explained in an easy to understand way how to replace the defrosting fan. Frankly speaking, Samsung fridge was taken as an example, but it isn’t global, the heating element in similar units is changed in the same way

Watch this video to see how to change the defrosting fan on a No Frost refrigerator

As you see in replacement of a heating element, though there are complexities, but all the same such work can be done and the hands, will be much cheaper. The main thing here is to understand that only two wires go to the heater itself, and the rest of the wiring goes to the fuse and to the control module. This video shows how I converted the wires, from one model to another

How to check sensors of temperature and defrost on refrigerator LG No Frost

I wrote above that there are two control systems in similar units. In mechanically controlled refrigerators, the defrost sensor acts as a thermostat, and in electronically controlled refrigerators the thermistors, or as they are also called thermistors, are used. The main property of a thermistor, to change its resistance when the temperature decreases or increases. I have chosen a few questions, thanks to which I will try to solve this problem

Hello, my refrigerator does not work the freezer, after opening the front cover in front of the evaporator, I found that the freezer is completely covered in ice. I was advised to replace the defrost sensor and check the heater. The heater I checked without difficulty, but the sensor, a little confused. Where is it located and what does it look like, I found two sensors in a silicone bag. Wanted to wire them, but neither ohms nor mega ohms they do not ring. I have a fridge with electronic control that is, I set the temperature with buttons

Photo of the defrost sensor for the LG No Frost refrigerator

Yes indeed, there are two sensors in one silicone package. One is a fuse, its resistance is almost zero, but the other (white), it is the defrost sensor, its resistance at room temperature is 13 kOhm

Please help me with LG No Frost refrigerator repair. The problem is that the evaporator is constantly accumulating ice, defrosting every two or three weeks, depending on the time of year. The defrost heater was checked and seems to be intact, in any case, the coil is not broken. I can’t check the defrost sensor or rather I don’t know its resistance, at room temperature it shows 6 kOhm, if warmed up it remains the same. Is this correct or not?

At room temperature the resistance of the defrost sensor should be about 13 kOhm, if the temperature rises or falls, the resistance should change. From what you wrote, the defrost sensor is bad

I am sick and tired of my Ski, I constantly defrost. The fridge is old, the temperature is set by thermostat, the problem is that after a month after a deep defrosting, the fridge again stops working and moreover, the motor on the fridge does not turn off. In general I have to defrost again for 2-3 days and only then it starts to work properly

As I understood you have LG refrigerator with mechanical control system. To cope with your problem, it is desirable to change the entire mechanics, that is, the defrost sensor and clock mechanism. Trust me, as an experienced craftsman, replacing one of these parts may not produce the desired result. The thing is that each part has its own resource, in your case, this resource they have worked off. Do not listen to those who will advise you to change everything separately, it is better to do all at once and for sure. On the photo below you can see the timer and defrost sensor

Photo of defrost sensor for LG Nou Frost refrigerator with mechanical control

Photo of LG No Frost refrigerator timer

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