Why it freezes in the bottom of the freezer ice: technical reasons and solutions

You open the freezer and find a thick layer of ice on the bottom - is this a familiar situation? This problem occurs both in old models Atlant or Biryusaand in modern refrigerators Samsung No Frost and LG Inverter. Ice does not just take up useful space: it forces the compressor to wear out, increases energy consumption and can lead to breakdown. But why does ice form specifically at the bottom of the freezer, and not on the walls or ceiling?

In 80% of cases, they are to blame air circulation problems or failures in the defrosting system. However, the root of the problem may also lie in simple operating errors - for example, when users put hot food in the freezer or forget to close the door. In this article we will look all possible causes of ice on the bottom of the freezer, including those that are not written about in the instructions from a clogged drain hole to a malfunctioning thermostat. We will also give step-by-step instructions on how to fix the problem yourself, without resorting to a specialist.

1. The drainage hole is clogged: the main cause of ice on the bottom

In most refrigerators with a system drip thawing (not No Frost!) there is a small hole on the back wall of the freezer - drainage. Through it, melt water flows into a special pan, where it evaporates. If this hole becomes clogged with food crumbs, dust or mold, the water does not leave - it accumulates at the bottom and freezes, forming an ice “coat”.

How to check? Unplug the refrigerator, defrost it, and inspect the drainage hole (usually located in the center of the back wall of the freezer). You can often see a plug of mud or even an ice crust there. In refrigerators Indesit and Ariston the drainage is especially narrow - it can be easily blocked even by small particles.

• 🔍 Signs: ice only at the bottom, water under the vegetable drawers (if there is a leak into the main chamber).
• ⚙️ Solution: cleaning the hole with a cotton swab, wire or syringe with warm water.
• ⚠️ Danger: if you do not clean the drainage, water will begin to leak into the refrigerator compartment, which will lead to icing of the evaporator.

2. Malfunction of the defrosting system (for No Frost models)

Refrigerators with a system No Frost (for example, Samsung RB30J3000WW or Bosch KGN39XL45) theoretically should not freeze. However, if you see ice at the bottom of the freezer, this is a sure sign of breakdown automatic defrosting systems. In such models, the following are responsible for the evaporation of moisture:

• 🔥 Heating element (defrosting heating element) —defrosts the evaporator.
• 🕒 Defrost timer —turns on the heating element on a schedule (usually every 8–12 hours).
• 🌡️ Defrost sensor - controls the temperature of the evaporator.

If any of these elements fails, the moisture does not evaporate, but flows down and freezes. For example, if the heating element breaks down, ice will grow evenly along the entire back wall and then “slide” to the bottom. In refrigerators LG with a system Total No Frost the sensor often breaks down - it is checked with a multimeter (the resistance should be ~5–10 kOhm).

How to check the defrosting heating element without a technician?

1. Turn off the refrigerator and defrost it.

2. Remove the back panel of the freezer (usually it is secured with 4-6 screws).

3. Find the heating element - this is a tube with wires located under the evaporator.

4. Test it with a multimeter: the resistance should be 20–40 ohms. If the device shows “1” (break) or “0” (short circuit), the heating element is faulty.

3. The door seal is damaged: an invisible but critical problem

The rubber seal (aka door circuit) loses its elasticity over time, cracks or moves away from the body. Because of this, warm air enters the freezer and condenses on the coldest surfaces - usually at the bottom. This happens especially often in refrigerators with a bottom freezer (for example, ATLANT MHM 2835-90 or Stinol STS 167).

How to diagnose? Carry out a simple test:

1. Take a sheet of A4 paper.
2. Place it between the seal and the body of the refrigerator.
3. Close the door and try to pull out the sheet.

If the paper comes out easily, the seal is not airtight. Also inspect the rubber for cracks or cracks. deformations.

⚠️ Attention: Do not try to “reanimate” the seal with boiling water or a hairdryer - this is a temporary solution. Damaged rubber must be replaced, otherwise the problem will return in 1-2 months.

4. Incorrect loading of products: mistakes you didn’t know about

Even in a working refrigerator, ice can appear on the bottom of the freezer due to improper distribution of food. common mistakes:

• 🥩 Hot foods. If you put a pan of hot soup in the freezer, the moisture will evaporate and settle at the bottom in the form of ice. In refrigerators No Frost this can damage the fan.
• 📦 Open containers with liquid. Water bottles or broth packets “breathe” moisture that condenses at the bottom.
• 🧊 The packing is too dense. If foods are placed close to the back wall, they block circulation air, and moisture does not evaporate.
• 🥬 Vegetables and fruits in the freezer. They contain a lot of water, which is released during freezing and settles at the bottom.

Solution simple: pack food tightly (use vacuum bags or containers with lids), do not put hot things in the freezer and leave gaps between products for air circulation. In refrigerators Liebherr i Beko there are special “SuperFreeze” modes for quick freezing - they help to avoid icing.

5. Failure of the thermostat or temperature sensor

If the refrigerator works without stopping, and ice forms in the freezer not only on the bottom, but also on the walls —the thermostat or temperature sensor is to blame. These devices are responsible for controlling the climate in the chamber. If they break, the compressor does not receive a signal that the desired temperature has been reached and continues to cool, which leads to icing.

How to check the thermostat:

1. Disconnect the refrigerator from the mains.
2. Remove the protective thermostat casing (usually it is located next to the lighting lamp).
3. Test the contacts with a multimeter in resistance test mode. At room temperature, the resistance should be ~0 Ohm (the contacts are closed).

If the device shows an open circuit, the thermostat is faulty.

⚠️ Attention: In refrigerators with electronic control (for example, Samsung RL38TDCASa temperature sensor is used instead of a mechanical thermostat. It is checked by voltage: at +20°C the output should be ~0.5–1 V, at -18°C - ~4.5–5 V.

6. Fan malfunction (for models with No Frost)

In refrigerators No Frost the fan is responsible for air circulation. If it breaks or is blocked by ice, the cold air is no longer evenly distributed throughout the chamber. As a result, moisture condenses at the bottom of the freezer, where the temperature is lowest. Signs of fan failure:

• 🔇 No operating noise (normally the fan hums slightly).
• ❄️ Ice builds up on only one side (where the fan is located).
• 🌡️ The temperature in the freezer is uneven (for example, -18°C on the top shelf and -24°C on the bottom).

To check the fan:

1. Unplug the refrigerator and defrost it.
2. Remove the back panel of the freezer.
3. Try to turn the fan blades by hand - they should rotate easily, without jamming.
4. Test the winding with a multimeter (resistance ~200–500 Ohms).

If the fan is blocked ice, do not chip it with a knife - use a hair dryer to defrost.

Check whether the blades rotate manually

Test the winding with a multimeter

Inspect the wires for breaks

Make sure that there are there is no ice with the fan

-->

7. Freon leakage or clogged capillary tube

If ice at the bottom of the freezer is accompanied by constant operation of the compressor poor cooling, the problem may lie in freon leak or clogged capillary tube. In this case, the refrigerant does not circulate normally and the temperature in the freezer becomes unstable. Humid air condenses in the coldest areas - as a rule, this is the bottom of the chamber.

Signs of a freon leak:

• 🕒 The compressor runs without stopping or turns on too often.
• 🌡️ The temperature in the freezer is above -12°C, despite the maximum settings.
• 🔧 Oil stains are visible on the back wall of the refrigerator (freon is mixed with oil).

This is one of the most serious breakdowns that cannot be eliminated on your own. You will need the help of a specialist with equipment for refilling freon. In refrigerators Whirlpool i Electrolux clogging of the capillary tube often occurs due to moisture entering the system - this requires complete cleaning and replacement of the filter-drier.

What to do if ice has already appeared: step-by-step instructions

If an ice crust has already formed at the bottom of the freezer, follow the algorithm:

1. Turn off the refrigerator plug in and leave the door open for defrosting (at least 6-8 hours).
2. Remove the ice with a plastic spatula (do not use metal objects!).
3. Clean the drainage hole (see section 1).
4. Check the seal and replace it if necessary.
5. Inspect the back wall freezer for ice on the evaporator (in No Frost models).
6. Turn on the refrigerator and observe for 2-3 days. If ice appears again, look for a breakdown (thermostat, fan, heating element).

To speed up defrosting, you can use a hairdryer in cold air mode (keep it at a distance of 30 cm from the surface). In refrigerators No Frost it is not recommended to mechanically remove ice from the evaporator - this can damage the tubes.

⚠️ Attention: Never use boiling water or hot objects (for example, a frying pan with boiling water) for defrosting. A sudden change in temperature can damage plastic parts and seals, as well as lead to cracks in glass shelves.

FAQ: Frequently asked questions about ice in the freezer

Is it possible to place a refrigerator on the balcony in winter? Does this cause icing?

No, the refrigerator cannot be operated at temperatures below +10°C (for most models). In cold weather, the oil in the compressor thickens, and freon cannot circulate normally. This leads to icing of the freezer. If the refrigerator was on the balcony, before turning it on, you need to keep it warm for at least 12 hours. incorrect operation of the thermostat and freezer icing. If the refrigerator was on the balcony, it must be kept warm for at least 12 hours before turning it on.

Why does ice still form in the No Frost refrigerator?

The No Frost system prevents icing evaporatorbut not guarantees complete absence of ice. If you see ice on the bottom of the freezer, this may be caused by:

• Clogged drainage hole (even No Frost has drainage!).
• Failure of the fan or defrosting heating element.
• Leaks seal.

Normally, a thin layer of frost may appear in No Frost refrigerators, but not an icy “coat.”

How often do you need to defrost a refrigerator with No Frost?

Manufacturers claim that No Frost refrigerators do not need defrosting. However, in practice it is recommended to carry out preventive defrosting every 6-12 months. This is necessary for:

• Cleaning the drainage hole.
• Removing odors.
• Checking the operation of the fan and heating element.

Defrosting also helps prevent the growth of bacteria in the seal.

Can ice in the freezer be hazardous to health?

Ice itself is not harmful, but it creates favorable conditions for mold and bacteria growth. If water constantly accumulates in the freezer, an unpleasant odor may develop over time and food will spoil faster. In addition, a thick ice crust can damage plastic parts when trying to remove it.

Is it worth repairing an old refrigerator or is it better to buy a new one?

It depends on the type of breakdown and the age of the refrigerator:

• If the problem is in the seal, drainage or thermostat, the repair will cost 1,500–4,000 rubles and will be justified.
• If a compressor or evaporator needs to be replaced or refilling freon - the cost of repairs can exceed 10,000 ₽. In this case, for a refrigerator older than 10 years, it is more advisable to consider purchasing a new model.

Modern refrigerators (for example, Samsung RB37A52N0SA or LG GA-B489 YDQZ) consume 30-40% less electricity, which will pay off their cost in 3-5 years.