Why the back wall in the Indesit refrigerator freezes: 7 reasons and what to do

We noticed that in your refrigerator Indesit the back wall Is it covered with ice or frost? This is not just an aesthetic problem - a thick layer of ice impairs the performance of equipment, increases energy consumption and can lead to compressor failure. In 80% of cases, the cause can be eliminated independently, without resorting to the help of a specialist. But first you need to figure out why this happens.

Many people mistakenly think that ice is the norm for refrigerators with a drip defrosting system (which most models are equipped with Indesit). In fact thin layer of frost can indeed appear during active operation of the compressor, but it should thaw completely during idle periods. If ice accumulates and does not disappear, this is a signal of a malfunction.

In this article we will analyze in detail all possible reasons - from trivial misuse to serious technical problems. You'll learn how to diagnose the problem, what you can fix yourself, and when it's time to call a specialist. We will also provide a checklist for prevention so that your refrigerator works without ice.

1. Violation of operating rules: 3 user mistakes

Most often, the back wall freezes due to improper use of the refrigerator. The manufacturer Indesit clearly states the operating conditions in the instructions, but many users ignore them. Here are the three most common mistakes:

• 🔥 Food overload. If the refrigerator is full to capacity, the circulation of cold air is disrupted. As a result, the back wall becomes supercooled, and the compressor works non-stop, trying to reduce the temperature.
• 🚪 Long opening of the door. Every time you hold the door open for more than 30 seconds, warm, humid air accumulates inside. It condenses on the back wall and freezes.
• 🌡️ Incorrect temperature. The optimal mode for the refrigerator compartment is +4…+5°C. If you set +1…+2°C, the compressor will work more intensely, and the back wall will freeze.

Check whether there are hot foods in your refrigerator. Even warm soup in a pan increases the temperature inside the chamber by 2-3 degrees, forcing the cooling system to work at its limit. The same applies to tightly packed products in polyethylene - they block air exchange.

How to fix:

1. Unload the refrigerator, leaving gaps between products.
2. Set the temperature to +4°C (in models with electronic control, check the settings through the menu Temperature → Fridge).
3. Do not keep the door open for more than 20-30 seconds.

2. Clogged drainage hole: how to clean it without a technician

In refrigerators Indesit with a drip defrosting system there is a small drainage hole on the back wall. Through it, the moisture formed during defrosting flows into a special tank. If this hole becomes clogged, the water stagnates, freezes and forms ice.

Signs of a blockage:

• ❄️ Ice accumulates at the bottom of the back wall.
• 💧 A puddle appears under the vegetable drawers.
• 🔊 The refrigerator has become louder (the compressor does not turn off).

How to clean the drain:

1. Unplug the refrigerator.
2. Remove all food and shelves from the bottom of the refrigerator.
3. Find the drainage hole (usually in the center of the back wall, under the plastic cover).
4. Take a cotton swab or soft wire, moisten it in warm water and carefully clean the hole.
5. Rinse the drainage using a syringe or syringe (without a needle) with warm water.

If the blockage is severe, you can use a soda solution (1 teaspoon per glass of water) for disinfection. Never use sharp objects (knitting needles, knives) - they can damage the plastic parts of the system!

Turn off the power|Take food out of the lower area|Find the drainage hole|Clean with a cotton swab|Rinse with warm water|Wipe dry-->

3. Malfunction of the thermostat or temperature sensor

If the back wall freezes even with proper operation, the problem may lie in thermostat (in mechanical models) or temperature sensor (in electronic ones). If they break down, the compressor receives incorrect signals and works without stopping, freezing the chamber.

Symptoms of malfunction:

• 📉 The temperature in the refrigerator is lower +2°C, despite the settings.
• ⏳ The compressor runs constantly, without pauses.
• 🔄 After defrosting, ice appears again after 1-2 days.

How to diagnose:

1. Check the temperature using a separate thermometer (put it on the middle shelf).
2. If it is lower installed, and the adjustment does not help - most likely, the thermostat is to blame.
3. In electronic models (Indesit ITF 118, Indesit ITF 119), a sensor malfunction is usually displayed as an error code on the display (for example, F04 or F05).

It is difficult to replace the thermostat or sensor yourself - you will need to disassemble the back panel of the refrigerator. If If you are not confident in your skills, it is better to call a specialist. The cost of replacing a thermostat for Indesit is from 1500 to 3000 rubles (depending on the model).

How to check the thermostat with a multimeter

To check the thermostat, you need to dismantle it and ring it with a tester at room temperature between the terminals. there should be resistance (usually 0 Ohm). If during cooling (for example, putting the thermostat in the freezer for 10 minutes) the resistance does not change, the part is faulty.

4. Freon leak: when you can’t do without a technician

Freon is a refrigerant that circulates through the refrigerator system and provides cooling. When there is a leak, it becomes insufficient. and the compressor begins to wear out, trying to compensate for the loss of cold. One of the symptoms of a leak is uneven frosting of the rear wall (ice appears in “islands” and not in a uniform layer).

Other signs of a freon leak:

• ❄️ The freezer does not freeze well, and the refrigerator compartment overfreezes.
• 🔊 The compressor hums louder than usual and almost does not turn off.
• 🌡️ The temperature in the chambers is unstable (either too low, then too high).

What to do:

A freon leak cannot be eliminated on your own - special equipment is required for refilling and soldering the tubes. If you suspect this problem:

1. Turn off the refrigerator and defrost it.
2. Do not turn it on until the technician arrives - this may lead to compressor breakdown.
3. Contact the service center Indesit or a trusted technician.

The average cost of repairing a leak and refilling freon is from 3,500 to 6,000 rubles. In some cases, it may be necessary to replace the evaporator (if the leak occurred in German).

5. Problems with the door seal: how to check and replace

The rubber seal around the perimeter of the refrigerator door ensures a tight seal. If it is damaged or deformed, warm air will penetrate inside, causing condensation and ice to form on the back wall. In models Indesit the seal most often wears out in the corners of the door or near the hinges.

How to check the tightness:

1. Take a sheet of paper (the size of a notebook).
2. Close the door by holding the sheet between the seal and the body.
3. If the sheet is easily pulled out, the seal is not sealed.

Check the seal for:

• 🕳️ Cracks or tears.
• 🧽 Contamination (fat, food residues).
• 🔄 Deformations (rubber has become hard or lost its shape).

How to restore the seal:

If the damage is minor, you can try:

1. Wipe the seal with a warm soda solution (1 tbsp. per 1 liter of water).
2. Apply a thin layer of silicone grease to restore elasticity.
3. If the seal comes off, glue it back with glue Moment (only for rubber!).

If the seal is very worn, it needs to be replaced. For refrigerators Indesit original seals with article numbers are suitable:

The seal can be replaced do it yourself, but you need to be careful. There are video instructions for specific models on the Internet Indesit.

6. Failure of the fan or No Frost system

Refrigerators Indesit with the system No Frost (for example, models Indesit ITF 218, Indesit ITF 220) should not freeze at all. If ice appears on the back wall of such a refrigerator, most likely the fan that distributes cold air evenly is not working.

Signs of fan failure:

• 🌀 Ice forms unevenly, only in one corner.
• 🔇 The refrigerator has become quieter (not you can hear the noise of the fan).
• 🌡️ The temperature in different zones of the chamber is very different.

Possible reasons:

1. The fan itself has iced up (you need to defrost the refrigerator).
2. The fan motor has burned out (required replacement).
3. Problems with the control board (the fan does not receive a signal).

For diagnostics:

1. Turn off the refrigerator and defrost it for 12-24 hours.
2. After turning it on, listen - you should hear the fan noise (slight humming).
3. If there is no noise, but ice appears again, call a technician.

The cost of replacing a fan in systems No Frost is from 2500 to 4000 rubles.

7. Failures in the control board: when the refrigerator “glitches”

In modern refrigerators Indesit with electronic control (Indesit ITF 119 W, Indesit ITF 220 W) the control board is responsible for all processes. If it fails, the compressor and fan may work chaotically, which leads to freezing of the back wall.

Signs of a board failure:

• 📛 Random errors appear on the display (for example, F02, F03).
• 🔄 The refrigerator turns on/off spontaneously.
• 🎛️ Does not respond to temperature settings.

What to do:

Failures in the board can be caused by:

1. Power surges (if the refrigerator is not connected through a stabilizer).
2. Moisture on the contacts (for example, during defrosting).
3. Factory defects (in new refrigerators).

In some cases, resetting the settings helps:

1. Unplug the refrigerator for 5-10 minutes.
2. Turn it on again and check the operation.

If the reset does not help, diagnostics of the board is required at a service center. Repair will cost 3,000–5,000 rubles, replacement - up to 8,000 rubles. In some cases, it is cheaper to buy a new refrigerator.

Checklist: what to do if the back wall freezes

To quickly determine the cause and fix the problem, follow this algorithm:

Check the temperature (should be +4...+5°C)|Free the refrigerator from excess food|Clean drain hole|Check the door seal with a sheet of paper|Defrost the refrigerator for 12–24 hours|Listen to the operation of the fan (for No Frost)|Check the error codes on the display (for electronic models)|If the problem persists, call a technician-->

If after all the manipulations the ice continues to build up, do not delay a visit to a specialist. Prolonged operation of the refrigerator in this mode will lead to breakdown of the compressor, and the compressor will break down. replacing it will cost 70–80% of the cost of a new device.

FAQ: Frequently asked questions about ice in the refrigerator. Indesit

❄️ Why does ice appear again after 2-3 days after defrosting?

This is a sign of one of the serious malfunctions:

• Freon leak.
• Malfunction of the thermostat or sensor.
• Problems with the control board.

You need professional diagnostics.

🔧 Is it possible to replace the thermostat in an Indesit refrigerator yourself?

Yes, but experience with electrical appliances is required. You will need:

1. Turn off the refrigerator and discharge the capacitor (to avoid electric shock).
2. Remove the rear panel of the refrigerator compartment.
3. Disconnect the wires from the thermostat and remove it.
4. Install a new thermostat (it is important not to mix up the terminals!).

If you are not sure, it is better to entrust the replacement to a specialist.

💰 How much does repair cost if the back wall is frozen?

The cost depends on the reason:

Problem	Cost (rub.)
Replacing the seal	1200–2000
Cleaning the drainage	800–1500
Replacing the thermostat	1500–3000
Freon leakage + refilling	3500–6000
Repairing the control board	3000–8000

⏳ How often do you need to defrost an Indesit refrigerator with a drip system?

The manufacturer recommends defrosting refrigerators Indesit with a drip system:

• With intensive use - once every 3-4 months.
• With moderate use use - once every 6 months.

If ice appears more often, look for the cause in malfunctions (see sections above).

🔌 Can a voltage surge cause freezing of the rear wall?

Yes, voltage surges can damage:

• Control board (the refrigerator will start to malfunction).
• Compressor (will work without stopping).
• Temperature sensors (will transmit incorrect data).

We recommend connecting the refrigerator via voltage stabilizer or at least a surge protector.

If your problem is not solved, describe the symptoms in the comments (model of the refrigerator, how exactly the wall freezes, are there any additional “symptoms”) We or other readers will try to help!