How a fridge no frost should work

Frost Free Freezers Vs. Regular Upright Freezers. Pros & Cons & How They Work

What is a Refrigerator No Frost System?

The place of honor in the kitchen, of course, takes the refrigerator. That’s what today’s article is about. In particular, we will talk about such a concept as No Frost in the refrigerator. What is it? How it is designed and what are its advantages and disadvantages? Below we will describe it in details.

Today’s models are so advanced that they require little or no care and maintenance. A few decades ago, women would spend at least half of their day off each month to perform a sacred act called “defrosting the refrigerator.”. Today many young housewives are not familiar with such a concept at all. This is possible thanks to new developments in refrigeration systems.

Modern units use two fundamentally different cooling technologies: drip and No Frost. The first is much more common and already familiar. But there are still a lot of questions about the second one.

If you believe the manufacturers’ promises, the fridges of No Frost system do not need to be defrosted at all. The fact is that the frost on the refrigerator walls appears due to the high humidity inside the chamber. The water droplets freeze and eventually turn into an ice crust.

Refrigerators with the No Frost system operate without producing frost and ice. By the way, the name of the technology itself says it all. “No freeze” literally means “no frost/freeze”. This effect is achieved by including several fans in the system. A stream of cool air blows around the inside walls of the chamber and dehumidifies the moisture droplets. Thus, there is practically no frost on the walls, which means that there is nowhere for the snow cap to form.

In refrigerators equipped with the No Frost technology the evaporator is moved outside the chamber and forced to air by one or more coolers. Frost does form in such units, but not in the chamber, but on the tubes and fins of the cooling system. From time to time a special heater is turned on that defrosts the system by itself. The liquid is collected in a pan behind the compressor and the process begins all over again.

Why is My Frost Free Freezer Icing Up?

Although “dry freezers” were specifically designed for use in countries with a rather humid climate, they are also widespread in our region.

Varieties of the system

The system can be either full or partial. The first type combines appliances that run on No Frost completely. both in the freezer and in the refrigerator compartment. Such systems are divided into independent, multilevel and combined. Partial technology is present only in the freezer, while the refrigerator chamber works with the help of drip equipment.

Frost Free

It is a combination of two technologies simultaneously: No Frost (Low, Smart or Full) and drip. In the refrigerating zone, a constant temperature is maintained thanks to the drip system and the freezer compartment functions with the help of No Frost. The two compartments do not interact in any way and do not depend on each other. As a rule, these refrigerators always have a compressor device.


This technology was created specifically for Liebherr’s premium refrigerators. The appliance cools evenly and this has a positive effect on the quality of the food stored in it. the food is less likely to get airy and does not dry out. Appliances with this system have additional options:

fridge, frost, work
  • Frost Safe. availability of 3 hermetic drawers;
  • Vario Space. the possibility of fully transforming the appliance for a comfortable increase in space;
  • Magic Eye. LED temperature indicator.

Full No Frost

No Frost in refrigerators with this technology means that these units have self-contained evaporator defrosting systems in the low- and medium-temperature zones. So the only difference of this type of refrigerator is the quality of using No Frost technology.

Neo frost

Neo frost in the refrigerator is a system that is created by the famous company Beko. A distinctive feature of this technology is the complete isolation of all the compartments of Full No Frost appliances from each other. Different types of food freeze faster with Neofrost.

Total No Frost

This premium technology is created and patented by LG. The air flows are distributed in a special way, resulting in significantly shorter freezing times. All it does is improve the taste of frozen food, saves energy and prevents mould fungus and bad odours from forming in the fridge compartments.

The principle of operation of the Neo Frost system

The No Frost function in your refrigerator and what it is, is now a little clear, it is only necessary to understand how it works. Since cold air is constantly circulating in the chambers, defrosting is automatic.

The air is forced in by fans and then enters the evaporator. Also, a small amount of moisture comes out on the evaporator, which is converted into frost. But it doesn’t stay there for long. A heater is turned on, which turns the thin ice into water.

The water formed flows into the special tray under the refrigerator and then evaporates.

The fans must run continuously to keep the cold air evenly in the chambers.

What to consider when choosing?

expensive No Frost appliances are usually purchased with a long life expectancy. That is why special attention should be paid to the selection.

The main criteria include:

  • size and volume;
  • economy;
  • climate class;
  • the number and type of compressors;
  • availability of additional functions;
  • Configuration, color, design.

Parameters of the refrigerator depend both on the area of the room where it will be installed and on the number of people in the family.

When choosing, it is desirable to take into account food habits. If the family is used to regularly buy batches of products in hypermarkets, it is reasonable to give preference to more spacious equipment

Since the units are designed for years of continuous operation, it is important to consider the power consumption and give preference to economical Class A, A, A models. This rule is especially important if the “No Frost” function is available, since in such a case, more electricity is required.

Residents of cold or, conversely, too hot regions should pay attention to the climate class of household appliances, choosing models labeled SN and ST, respectively.

The number and quality of compressors is also important. Noiseless operation is distinguished by powerful inverter motors, but they are sensitive to voltage fluctuations.

Modern models of refrigerators provide a diverse set of options that improve the quality of food storage and increase the comfort of use. Common features include quick freezing, antibacterial coating, freshness zone, fast cooling, ionizer and other useful additions.

Even a unit with No Frost technology requires a complete defrosting at least twice a year for all the systems to work properly

In stores of home appliances you can find single and double chamber solutions, as well as chic options FrenchDoor and Side-by-Side.

Models come in a wide variety of colors and original ideas, such as marbled, painted or with mirrored walls. Built-in appliances are also popular: they have a large storage capacity in a compact size.

The difference between a drip and a No Frost refrigerator

You can find a huge selection of brands and models in appliance stores today. However, all of them can be divided into just two diametrically opposed groups:

Each of the systems has both advantages and disadvantages, about which we will talk a little bit below. For now, let’s understand what is the fundamental difference between one system and another.

The differences in principle lie in the circuitry of the unit itself. No Frost” refrigerator, as it is clear from the name, works “without a frost”. Although “frost”, or more precisely the minus temperature in it is certainly present, in such a unit you will never see piles of frozen snow and icicles hanging from the ceiling of the freezer. It happens so because its design includes a special system of air circulation that is provided by fans hidden inside the case. With such a cooling system, the walls will always remain dry, which means that the snow coat will simply have nowhere to go.

Drip cooling system is designed quite differently. The back wall of such a refrigerator is an evaporator, on the walls of which condensate is formed. the moisture released when cooling food. After some time so much liquid is accumulated that the refrigerator begins to “cry”. The droplets slowly trickle down into a special tray, from which they evaporate again after a while. The process is cyclical and in general does not require any participation of the user. Though sometimes mishap happens with such refrigerators. If you don’t wipe down the inside too carefully, the drain hole can get clogged over time. In this case you risk to find an unpleasant puddle, for example, under the drawer with vegetables.

To make the choice even easier, let’s highlight the most compelling pros and cons of each system.

Refrigerator No Frost: how often to defrost and how to take care?

Although No Frost refrigerators do not require defrosting because of the absence of frost, manufacturers still recommend that this be done at least once a year for a general cleaning.

All you need to do is unplug the unit, wash the walls and shelves, and then wipe them with a dry cloth. It is not necessary to wait for complete defrosting, as such devices defrost automatically.

Before defrosting, you must familiarize yourself with the following rules:

  • Do not clean in extremely hot weather;
  • If your refrigerator has a No Frost system in both chambers, defrost each chamber separately;
  • in devices with a single cooling circuit, you must set the thermostat to zero before disconnecting it from the mains;
  • The shelves and walls may only be cleaned once they have reached room temperature;
  • first clean the ventilation compartments. Use cotton swabs for this purpose;
  • After washing the shelves, s and other interior surfaces with detergent;
  • In the end, all surfaces must be wiped dry with a clean cloth;
  • The unit may be plugged in only when all the internal surfaces are completely dry.

Cleaning the rear exterior surface of accumulated dust will reduce the energy consumption of the unit.

For cleaning it is not recommended to use abrasive agents, because they can scratch the top plastic coating. Self-made soapy water or liquid detergents for cleaning dishes are the best way to go.

If as a result of careless use in the refrigerator appeared unpleasant smell, you can add a little vinegar to the soap solution. But vinegar should not be used to wipe rubber seals, as it will lead to the loss of their elasticity.

Stubborn mildew stains work fine with a water-and-whitewash solution. Overly aggressive chemicals must not be used, since they will eventually settle on the food.

The phenomenon of No Frost refrigerators. how pseudo-expertise dictates the rules

After 10 years of repairing refrigerators and washing machines you get tired of the monotony of questions, at first the question “what refrigerator should I buy??” I would begin to learn the budget, preferences, and get into a half-hour polemic of reasoning, backed up by mathematical calculations with a little immersion in probability theory and thermal engineering.

With experience, you begin to notice how customers react to such stories, after 2 sentences of 10 words, 70% of them start yawning, turn their eyes to the floor and at best can listen to 1-2 sentences more, after 5 minutes 90% of customers fell away because they were not ready

To the question “What should I buy??”you need a concrete answer “Samsung”, ideally add 1 sentence with the argument “they have a 3 year warranty”, most customers are satisfied with this answer, they waited for it and got it, although I don’t like Samsung refrigerators and their warranty is the same as everyone else’s.

When you are asked the same thing every day, while paying for the repair, not for advice on buying, your task is to be as polite and sociable, if you answer “Samsung” (any brand name), without argumentative addition, the client believes that you are rude, if you start to argue about the probability of failure, the need for a particular function, the customer will think you’re a nerd and try to “smart”

That is why I give the same answer to stupid and similar questions for which I do not get profit; the answer is far from being truth but it is necessary for my clients

No Frost. the function is well known to all and anyone who understands its meaning already considers himself a bit of an expert, because this knowledge was worth a lot to him))). To fool the mind of an average citizen is easy, to give the illusion of knowledge and seemingly logical choice is very simple, but the MASTERS. 80% of breakages of modern refrigerators are connected with No Frost system, but masters continue to recommend them, for example 4 of 10 “defective” refrigerators (40%) Beko with breakage “refrigerant leakage in the foam part” and not a single master will recommend Beko, all unambiguously speak about “crappy” and “broken parts” of the brand. Where’s the logic in that?? After all, No Frost units break more often.

The logic of recommendation features is connected to the complexity of malfunction repair, to repair NoFrost it is not necessary to work with freon, there is no need to solder, vacuumize and refill, it is enough to change the defrost sensor or timer. For the end customer it does not matter how technologically difficult to fix the problem, he had a fridge that didn’t work and now has a working fridge

Here everything is much more complicated and it is impossible to make an unambiguous conclusion, the customer when buying a fridge recalls his experience, as a rule the solvent part of the population still left behind Oka, Chinar and ZIL fridges. arguments of salespeople that there is no defrosting evoke this very associative chain. no one says that No Frost is a noisier technology and more energy-consuming, the food gets stale and dries out like spongebob in sugar.

Another option is pseudo-expertise, brevity of instructions and clarity of deciphering, which I mentioned in the beginning makes the customer a guru of choice. No one is saying that any fridge needs to be defrosted and washed once a year but modern fridges without NoFrost can run for up to 5 years without defrosting

  • Higher probability of breakdown due to additional defrost elements
  • Higher noise level and annual power consumption
  • Food dries out
  • Lack of the temperature difference needed to store different products, the air is constantly mixed
  • expensive

Yes, my opinion is biased and if there is a society of struggle against No Frost and other nonsense, let them contact me, I am ready to advertise their Atlant (not bad fridge by the way, if more compressors will put normal, but their work as peorators, the price will not be)

What is a refrigerator’s operating cycle

The main thing in the unit is the compressor. The intervals at which it is turned on and off, helps to maintain a given temperature in the refrigerator. There is a sensor built into the appliance that measures the temperature.

When the temperature gets higher, the temperature sensor sends a signal to the compressor and it starts working. Temperature reaches the optimal value and the motor shuts down. After the air in the refrigerator’s chambers warms up, the motor turns back on to draw in the cold.

This is the refrigerator’s duty cycle. As a result of infrequent compressor shutdown, the unit’s operating and resting times are extended. In this case the food can freeze. And if the idle time is too long, the evaporator can thaw and ice will appear on the walls.

If the motor is frequently turned on/off, the entire efficiency of the refrigerator is reduced. Energy consumption increases, so electricity costs go up accordingly.

fridge, frost, work

How long does the refrigerator have to turn off?

The observations of the experienced masters and ordinary users show that the refrigerator has approximately the same operating and resting times. In both cases, it will be 12 hours. The refrigerator’s on/off interval is not tied to a certain figure, but depends on a number of factors:

You can also set the minimum temperature mode for an empty refrigerator. But this is relative, since the operation of a new unit, even for 24 hours, is not considered a malfunction.

In two-chamber No Frost refrigerators, at the expense of the temperature sensor and the evaporator, the “Defrost” mode is triggered after switching on and freezing. In this case, the average operating time of the fridge is from 8 to 15 minutes. Of these, it takes 2 to 4 minutes to cool., The rest. for defrosting.

How often should the refrigerator switch on?

There are some rules about how often your refrigerator should turn on and how often it should turn off. It is optimal when the unit switches on 4 to 8 times an hour. Compressor operation during this time, is 2-4 minutes. If the engine only switches on once in this hour, there is a problem.

The users wonder how long it takes for a new refrigerator, for example, to turn off. Here the unit must operate for 2 to 8 hours without stopping.

What happens if you don’t defrost your fridge

The manufacturers of “no ice” refrigerators assure that defrosting is not necessary. I think that this is a marketing ploy. The question whether it is necessary to defrost the refrigerator with a no frost system, I will answer in the affirmative. It is necessary to take care of a fridge, otherwise even a super-modern device will be infected with mold, will smell and turn into source of infection. The rules for defrosting a no-frost fridge are simple and the procedure requires little time. You will not see snow in it, but there are invisible bacteria, from which it is impossible to get rid if you do not turn off the unit for a while.

The fridge with the no frost system is convenient, practical and does not require much effort for cleaning. Yes, its price is somewhat higher compared to drip analogues, and its dimensions are larger. But these disadvantages pale in comparison with its advantages. No better cooling system has been invented yet.

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