What’s the reason if the refrigerator does not turn off

Why the refrigerator does not turn off for a long time in summer

During the warm season, the temperature in the house or apartment rises. The principle of work of any refrigerator is based on freon evaporation and condensation cycles. The efficiency of the process depends on the temperature difference between the condenser and evaporator.

The higher it is, the lower the COP conversion efficiency of the refrigeration equipment. Accordingly, in summer the compressor will switch on and off more often. If frequency of switching on has increased in a warm season in comparison with the winter, it is in the order of things. But if the compressor works all the time without turning off. it’s not normal.

To reduce compressor wear and to prolong the life of your refrigerator, set the temperature of the main compartment 2-4 degrees higher and the freezer compartment 3-5 degrees higher. Determine the exact value by experiment so as not to be inconvenienced.

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Why the refrigerator does not switch off and works without stopping Ways to fix it by yourself

Among the main causes of the refrigerator without stopping are:

  • Damage to the door seal;
  • Thermostat failure;
  • Freon leakage;
  • Capillary tube clogged;
  • Failure of the fan in the refrigerating compartment;
  • Improper setup and installation.

Diagnosis is made with special tools. Some problems (e.g., a worn seal) are detected by visual inspection. The in-depth inspection will allow to understand precisely, why the refrigerator does not switch off and to choose the correct method of troubleshooting. Diagnosis examines each individual assembly and component that may be responsible for non-stop operation.

Depending on the type of the detected failure the decision to repair or replace the component is made. In some cases the repair can be carried out in house conditions, in others it is required to deliver the refrigerator to the repair shop. If you correctly determine what the problem is, it won’t take long to repair it.

Seal damage

The sealant begins to wear out little by little practically in all the refrigerators. This is one of the most common causes of long-term use. As it wears down, more and more heat enters the compartment from the room. It causes the refrigerator to work longer to maintain the proper temperature in the fridge or freezer compartment.

You can find the problem on your own. The refrigerator door does not fit tightly or there are gaps. The solution is to repair or replace the entire door seal. The repair work takes 30-60 minutes. Wear of the seal is the easiest reason why the fridge does not turn off. Despite this, it is not always possible to solve it yourself.

The thermostat is broken

The thermostat is a device that allows you to maintain a constant temperature inside the unit. It regulates the refrigerator‘s operation and when the temperature falls to the right values, the engine shuts down. If the thermostat malfunctions, the motor runs continuously and freezes heavily.

If the thermostat or a separate temperature sensor breaks, the part must be replaced. It is also recommended to check the control unit along with the thermostat. In some cases, the operating sensor malfunctions due to the output of the main control unit. In this case, even if the necessary temperature is reached inside the chamber, the refrigerator does not turn off for a long time.

Freon leakage

The freon is the coolant in refrigerators. Under certain circumstances freon can leak. One of the signs of a leakage is when the unit runs without stopping. This is the way the refrigerator tries to compensate for the lack of freon. If there is a leak, it is important to unplug the product as soon as possible. Operation without freon leads to failure of the compressor. The leakage is considered as rather widespread and dangerous reason why the refrigerator constantly works and does not shut off.

In order to solve the problem it is necessary to find the place through which the refrigerant is leaking, to eliminate the hole and to charge the system with the necessary quantity of the freon. Most often, a leak is detected in the freezer’s steel heating circuit, evaporator, or dehumidifier. Refrigerant charging is carried out at home. After repair the expert checks the refrigerator operability. Freon sometimes needs to be refilled on older units that have been in operation for more than 10 years. In the course of diagnostics it becomes clear how much the refrigerant is missing.

Capillary tube clogging

If the capillary tube is clogged the efficiency of the product decreases. If the refrigerator does not turn off, or works with rare interruptions, the problem is most likely related to the capillary tube. The clog can be eliminated by replacing the tube and filter of the dehumidifier. After the work is done, the system is vacuumed and the refrigerant is charged.

Blockages usually occur when using the refrigerator for extended periods of time. It appears because of interaction of oil and freon that circulate inside the system. Most modern refrigerators include protection against capillary tube blockage. If the product does its job but does not turn off, one of the causes may be a narrowing of the tube lumen.

You have set this operating mode

Often the refrigerator does not turn off because the thermostat is not set correctly.

In the main chamber, the temperature must be between 0°C (freezing point of liquid) and 5°C (the limit in which bacterial growth slows down). But there is thermal stratification inside the cooling unit. that is, different places have different climates, and putting food in the wrong places can cause it to freeze. The distribution scheme is as follows:

  • to lower containers (7°C). vegetables, fruit, herbs;
  • to the bottom shelf above the containers (2°C). meat and fish;
  • on the middle shelves (4°C). dairy products, eggs, soups
  • To the top shelves (7°C). garnishes, jams.

On the door shelves (10°C), it is advisable to store food that requires only light refrigeration, e.g. beverages, concentrates, ready-made sauces.

Thermostat relay failure due to rupture of the bellows tubing

Relay contacts are in closed position all the time, so that the compressor is energized without interruption. It is active until the thermal protection device is triggered. This mode lowers the temperature in the refrigerator to a minimum and causes frost to accumulate.

Refrigerator Runs Constantly — Refrigerator Troubleshooting

Eliminating the problem will require the help of a professional technician who will diagnose the relay and decide whether or not to replace it.

Fan failure

Sometimes you can’t figure out what’s causing the malfunction. All the device systems work properly but the device continues to operate without interruption. Verify that the fan is distributing air throughout the interior.

You should check the fan under different conditions if you want to find out why the refrigerator does not turn off. If the fan motor has failed, a complete replacement will be required. The fan should run when the door is closed. Find and press the button to simulate closing the door and check the operation of the product.

Even if the blades are spinning, it does not mean that the fan is doing its job. The efficiency of cold air distribution throughout the chamber should be evaluated. Sometimes the speed of rotation is significantly reduced, so there is a lack of circulation when it appears to be working.

Compressor malfunction

Old-style refrigerators have only one motor, so its failure is immediately noticeable: there is no cold and can not hear the motor. But new two-compartment models, such as Whirlpool or Samsung Know Frost, have two compressors: for the freezer and main chamber. When one motor fails, the second motor works as before, but it takes longer to maintain the desired temperature.

In this case, the Alarm sign will appear on the panel. a red light, signaling an error.

Traces on evaporator spigots directly indicate a malfunction in the cooling system

High temperature in the room

A similar problem occurs in the summertime, when the engine does not freeze well. it has to cool in the emergency mode without a break, which leads to a breakdown. To prevent overheating, it is recommended:

In addition, you should install an air conditioner in the room which will cool the air if necessary.

Also read: What to do if your refrigerator won’t cool or freeze

Malfunctions in the control module

Modern refrigerators are equipped with a sophisticated electronic system that protects them from voltage fluctuations in the network, short circuits and other malfunctions.

The control module is responsible for the operation of all electronic systems. Failures in its functioning are caused by faulty contacts inside the unit or incorrectly installed software. Only a technician can determine the exact cause by checking the module on the computer.

If it is not the control module that is at fault, it will indicate the location or causes of the malfunction by displaying the error code on the backlit display. For example, in the Bosch electronic display system, an error code is displayed for the temperature sensors.

Indication and error code on the control module indicates the cause of the problem

Damage to the evaporator defrosting system

Ice builds up in the freezer if the heating element, fuse, timer or defrost sensor is broken. Ice accumulation blocks airflow and causes the unit to stop cooling properly.

Failures of evaporation nozzles

Evaporation nozzles are part of the engine and affect the entire refrigeration system. The most common causes of failure are ice clots caused by improper engine operation or leakage due to mechanical damage. The causes of these failures are as follows:

A few tips to protect your unit from malfunctions

Proper use of this equipment prolongs its life span and prevents many malfunctions. There are recommendations on what to do for the normal functioning of refrigeration equipment. Let’s list them:

  • Do not place the appliance only according to the recommendations in the operating manual;
  • Do not place hot, unrefrigerated food inside;
  • You should periodically perform a complete defrosting of the unit and its proper maintenance;
  • Do not place anything too heavy on top of this equipment;
  • Do not clog it tightly and for a long time with products.

Negative effect of the fridge on the work of the refrigerator is its proximity to the oven, hob, microwave oven.

Causes of the refrigerator’s continuous operation

Poor operating conditions or improper settings often cause the motor to run continuously.

  • the appliance is installed in such a way that its back grill touches the wall or is located almost exactly against it;
  • The fridge-freezer is located too close to a hot radiator or other heater;
  • the room in which the appliance is located is too hot, the operating conditions are not met
  • The built-in super-frost function is activated and must be deactivated manually or does not deactivate in automatic mode for some reason;
  • The thermostat is on its lowest setting and the surrounding air is too warm.

All of these situations are related to heat exchange malfunction.

The device located next to the radiator does not produce cold. The principle of its action is based on constant extraction of heat energy inside the refrigerator and transferring it to the surrounding air.

If the air is too hot, the heat will not be absorbed. The refrigerator compressor will continue to run, unsuccessfully trying to reach the temperature set on the thermostat. As a result the main working organ of technics quickly will exhaust the working resource and will come in unusable.

And the greater the difference in temperature between the inside and outside of the refrigerator, the more heat energy has to be transferred, and the more difficult it is for the equipment to achieve the desired performance. In super-freezing mode, for example, heat transfer must be carried out very intensively.

If the heat does not escape from the refrigerator in time, the temperature sensors do not register the set by the program level of cold, the command to shutdown the compressor will not come, the equipment will continue to work.

There may be other possible causes of breakdowns of this kind, related to the wear and tear of individual parts of the device. For example, if the integrity of the rubber seal on the refrigerator door is damaged, it will result in a leaky interior.

The cooling equipment is drawing heat energy from the interior, but the heat is seeping in through tiny cracks.

And although the air inside feels cold, the sensors tell you that the temperature is not low enough. The compressor continues to run without stopping.

The next reason why a refrigerator can behave this way is because the refrigerator’s thermostat is malfunctioning, sending the wrong information to the control center. Finally, the compressor itself can wear out and work with insufficient capacity, not providing a sufficient temperature drop.

Another reason why the fridge does not shut down is because of a freon leak. The refrigerant acts as a “carrier” of heat in the system.

It absorbs dissipated heat particles inside the cold room, then moves them outside. If the amount of freon in the system is insufficient, then the cooling rate will slow down, as a result the refrigerator will run continuously.

You should not wait for the time when the sound of the running engine becomes constant. If the pauses between switching off and switching on of the compressor have noticeably decreased, and the periods of work have increased, most likely, it is time to think about charging the equipment with freon.

Owners of modern refrigerators find it a little easier to identify problems if the unit has a built-in self-diagnostic feature. Failures can be indicated by labeled codes, which are displayed on the control panel.

To decipher the message, it is necessary to use the instruction manual, where there is detailed information. However it is not necessary to trust this information blindly, sometimes in order to reveal exactly not only the problem but also its cause, it is necessary to carry out a detailed diagnostics of the condition of the device.

Usually the compressor duty cycle lasts 10-30 minutes, after which the appliance is switched off for about the same period. If the temperature in the room where the refrigerator is standing rises noticeably for some time, the duty cycle may be slightly longer.

But if the compressor continues to work in an abnormal mode even after the decrease of the outside temperature, it is time to engage in diagnostics of the condition of the device.

Problems with the power supply

Also, the compressor turns on almost immediately after being turned off due to a malfunction in the power supply. Over time, radio components such as capacitors dry out and lose their capacity. Because of this, any interference in the mains, which is considered normal, becomes an alarm and can cause an automatic shutdown. Also the probability of breakage of any of the integrated elements on the board is not excluded. In such a case, it will not be possible to repair the refrigerator yourself, because qualified assistance is required.

The power supply in this home appliances is used by pulse and it is necessary only for powering the logic board, which in its turn controls the work of the compressor and controls the temperature in the chambers. The breakdown could be due to the same sags and surges in the network or a defect in some of the components.

How to determine the malfunction by the sound?

The refrigerator may turn on and then immediately silence if any element is out of order. In order to understand the cause of the malfunction and which particular part of the refrigerator requires repair, it is necessary to analyze the sound when it switches on and off.

If the appliance started for a few seconds and a click was heard before shutting down, with the motor itself working louder usually, you will most likely have to repair or replace the compressor. Very part of the reason for the rapid disconnection of the refrigerator starting relay, through which the motor is started.

If the usual operating intervals are out of order, it is worth paying attention to the electronic board. Often when it breaks, it gives the wrong signals. the refrigerator turns on, but after only a few seconds, it shuts off.

See also. How to replace the thermostat in the fridge in case of fridge breakage

Causes of malfunction when refrigerator works without pauses

Factors why your refrigerator is not cycling properly on and off./off. or permanently:

  • Improper operation of the fridge when it is in working order:
  • Incorrect placement, setting, adjustment, temperature setting;
  • The fridge does not freeze and does not cool well because of the depressurization, gaps in the seal, distortion of the hinges, loose fit door. The sensor detects a constant lack of temperature, for a given thermal mode and boosts operation, there are no commands to turn off;
  • Electrical part malfunctions: sensors, relays, motor;
  • defrost breakage in NoFrost (fan, heating element);
  • Freon leakage.

Incorrect placement, adjustment, operation

Uninterrupted or too long work of the compressor, can be related to the following:

  • It cannot be excluded that the fridge does not switch off for long in hot weather, it constantly operates due to wrong location: lack of air clearance from the wall, high temperature in the room, proximity of batteries, heating or heating appliances. The result is a heated compressor that needs to work longer to cool the chambers. The heat can also cause the engine to run poorly, especially if it is worn out, or to burn out due to the loads;
  • The user sets both cooling and freezing at the same time using the thermostat. In order to provide the most intensive mode in all the chambers, the motor must run for several hours without stopping or for 24 hours. Example: “super-freezing” and maximum cooling in the refrigeration compartment is activated. The way out, what to do if the refrigerator constantly works without interruption is simple: check the settings, these modes often do not turn off automatically, they need to be deactivated manually;
  • heaps of frozen foods, create congestion and can provoke the long-time work of the motor, they interfere with the air flow inside the cabinet;
  • On the top panel is placed a TV, heavy objects, which changes the geometry of the cabinet.

Household appliances have their own climate class, especially important for refrigerators and freezers. for them, the temperature conditions set by the manufacturer are directly related to the quality of operation. for example, if you put your fridge in a closed and small non-ventilated room at 30° C, it is to be expected that the motor’s operating time will increase up to the point where there are no stops.

In a room with high temperatures, the probability of poor operation increases with a weak compressor and seal wear and tear. Under normal conditions a small amount of heat may not be noticeable, but it will significantly affect the functioning of the refrigerator in the heat, especially if the motor is old and has already lost part of its operational resource.


Causes of depressurization, loose closing of the door:

  • Wear, warping, jamming, pinching, gaps in the sealing gaskets around the door perimeter, including those in the interior compartment (freezer);
  • Skewed hinges;
  • Improper height adjustment of the feet, e.g. with the housing tilted to one side. Uneven loading is also a consequence: wear and tear, warping progresses faster.

During depressurization warm air enters the chambers, the cold comes out. the temperature rises, the temperature sensor detects a constant underpressure. A closed cycle is created: The compressor constantly tries to reduce the temperature and for this purpose the refrigerator does not switch itself off. The following symptoms are observed: The device works in principle but with short interruptions, the cooling chamber does not function properly (it works but does not cool) and the freezer compartment does not freeze properly.

Breakdowns of components and parts of the system

Variants of breakages of functional parts of the fridge:

  • Breakage of the thermostat, starting relay, sensor. The user is the first to set the temperature. The latter registers its achievement and sends a signal to a relay to open the circuit and turn off the motor. Failure of one of the listed nodes is the frequent reason of the refrigerator uninterrupted operation;
  • freon leakage. Due to a breach in the tightness of the tubes, refrigerant tank, connections between them, the substance leaks. Cooling capacity decreases due to lack of freon, as well as due to a decrease in pressure, which is insufficient for full circulation. The sensor detects the necessity of compensation and gives a signal to the motor to operate without pause;
  • Consequences of plugs in the capillary tube similar to those described above.

Over the course of time the relay contacts can stick or weld and there is a risk that the motor will operate up to the point of burnout. Similar consequences if the temperature sensor is broken, when it has no reaction to the temperature.

Voltage fluctuations can cause the microcircuits to malfunction. What to do to solve the problem: perform a reset, you must turn off the appliance, remove the plug from the socket and turn it on again.

A few tips to protect the refrigeration equipment from malfunctions

If used correctly the appliance will last for many years. In order for the equipment to function properly, the following recommendations must be followed:

  • Install the unit according to the instructions.
  • Do not put any uncooked food in the refrigerator.
  • Defrost the system regularly.
  • No heavy objects should be placed on the refrigerator.
  • It is not recommended to block the compartments tightly.

The refrigerator does not turn off: why and what to do?

Sometimes you may notice that your fridge does not turn off for a long time and is constantly on. After some time, no changes occurred, the motor continues to run without stopping. This indicates the occurrence of a certain breakdown, which caused the unnatural mode of operation. What are the factors that lead to such malfunctions will be described below.

Even those who are not versed in this technique have noticed that the engine runs intermittently. How long does the refrigerator have to turn off?? The duration of the operating and disconnected condition varies. This is affected by the set temperature of the internal chambers and the ambient air temperature. However, if the refrigerator does not turn off for about seven or eight hours, you should pay attention to the operating mode of the refrigerator. When intensive cooling or freezing is set, it is normal for the motor not to switch off and to run for a long time without stopping. Keep in mind: the later models, equipped with electronic displays, stop on their own after a specified period of time, returning to the normal operating mode. As for old refrigerators, it is necessary to take them out of freezing mode with your own hands. В противном случае, мотор будет работать долгое время без остановки.

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