Why the freezer freezes and the refrigerator does not cool: a complete analysis of the reasons

Have you opened the refrigerator, and instead of the usual chill you feel room temperature - even though the freezer is working properly? This situation is familiar to many owners of two-chamber refrigerators. The difference in the operation of compressors, clogged capillaries or a malfunction in the system No Frost are just some of the possible reasons.

In this article we will look at all the technical nuances, why the freezer freezes and the refrigerator compartment does not, - from simple fan freezing to thermostat failure. You will learn how to diagnose the problem yourself, when you can get by with simple defrosting, and when you can’t do without a specialist. And most importantly, how to prevent repeated failures.

How a two-chamber refrigerator works: a brief theory

To understand why one chamber works and the other does not, you need to understand the principle of operation of the system. Most modern refrigerators (for example Samsung RL-44, LG GA-B489 or ATLANT XM 6025-031) use single compressor, which cools both chambers through a common refrigerant line. The cold is distributed according to the following algorithm:

• 🔹 The compressor compresses the freon, heating it to a high temperature.
• 🔹 Hot gas passes through capillary tube
• 🔹 Liquid freon enters capillary tube - a narrow hole where the pressure drops sharply and the refrigerant evaporates, taking away heat.
• 🔹 The evaporator (in the freezer or behind the back wall of the refrigerator) distributes the cold among the chambers.

In models with No Frost a fan is added that evenly circulates cold air through both chambers. If the refrigerator single-compressorbut the freezer freezes, but the refrigerator compartment does not, the problem lies in a violation of this cycle. In two-compressor models (for example, Liebherr CNef 4815), each chamber has its own cooling circuit, and the breakdown of one does not affect the other.

Top 7 reasons why the freezer works but the refrigerator does not

Let's consider all possible scenarios - from the simplest to the most complex breakdowns. Start checking from the first point and move along the list until you find your situation.

1. The capillary pipeline is clogged

The capillary tube is a thin channel (~0.6–1 mm in diameter) through which freon enters the evaporator. Over time, it may become clogged due to:

• 🧊 Oil deposits (compressor oil decomposition products).
• 🔥 Oxidation of copper (in old refrigerators).
• 💧 Moisturethat got into the system due to improper refilling freon.

If clogged, the refrigerant cannot circulate freely, and the cold “gets stuck” in the freezer. Signs: the compressor works without stopping, the condenser (grid at the back) is cold, and the refrigerator compartment is warm.

2. Freon leak in the refrigeration circuit

Freon can leak through microcracks in the tubes, solders or evaporator. Most often, leakage occurs:

• 🔧 In places of soldering (for example, after unqualified repairs).
• 🛠️ In an aluminum evaporator (corrodes over time).
• 🚪 In case of mechanical damage (for example, during transportation).

If there is a leak The compressor is idling, since the refrigerant is not enough to cool both chambers. The freezer can still maintain the temperature (its circuit is shorter), but the refrigerator compartment cannot. Symptom: The condenser (rear grill) is barely warm, although the compressor is humming.

3. Fan failure No Frost

In refrigerators with a system No Frost (for example, Bosch KGN39XL30 or Indesit DF 5200 W) the fan is responsible for the distribution of cold. If it breaks:

• ❄️ The freezer will continue to freeze (cold accumulates near the evaporator).
• 🌡️ The refrigerator compartment will remain warm (air does not circulate).
• 🔊 It may appear extraneous noise (crackling, humming) or complete silence.

A common cause is freezing of the blades (due to a faulty defrost heating element) or failure of the fan motor. Check whether the fan rotates when the freezer door is open (in some models it turns on only when the door is closed).

4. Malfunction of the thermostat or temperature sensor

The thermostat (or electronic sensor in modern models) is responsible for turning the compressor on/off. If it breaks:

• 📉 The compressor may not turn on at all (the refrigerator is warm, the freezer is thawing).
• 📈 Or work continuously (the freezer freezes, the refrigerator does not cool).
• 🔄 In models with No Frost the defrosting logic may go astray.

You can check the thermostat with a multimeter (in the mode calls). At room temperature the contacts should be closed. If the resistance is infinite, the sensor is faulty.

5. Drain hole clogged

If the drain hole (at the bottom of the refrigerator compartment) is clogged with crumbs or ice, condensation does not drain into the pan, but accumulates at the bottom. This leads to:

• 💦 Formation of a puddle under the vegetable boxes.
• ❄️ An increase in ice on the back wall (blocks air circulation).
• 🌡️ An increase in the temperature in the chamber (the cold does not pass through ice).

Clean the hole soft wire or a syringe with warm water. In some models (for example Samsung RB-30 J3200EF), the drainage is hidden behind the panel - disassembly will be required.

6. Failure of the magnetic valve (in single-compressor models)

In refrigerators with one compressor, magnetic valve (or solenoid) is responsible for distributing the cold between the chambers. It switches the freon flow either to the freezer or to the refrigerator. If the valve is jammed:

• 🔄 Cold goes only to the freezer (the valve is “stuck” in the freezer position).
• 🔊 When switching, you can hear click, but the temperature does not changes.
• 🛠️ In some cases, the valve can be “unblocked” by lightly tapping (but this is a temporary solution).

7. Malfunction of the electronic control module

In modern refrigerators (for example, LG DoorCooling+ or Samsung Family Hub) an electronic board is responsible for the operating logic. If it fails:

• 📱 The display may show errors (for example, E1, FF or rH).
• 🔄 The compressor turns on chaotically or does not respond to commands.
• 🛠️ Often helps resetting settings (disconnect from the network for 10-15 minutes).

If after resetting the problem remains, you will need to diagnose the board or replace it.

Table: Symptoms and probable causes

Step-by-step instructions: what to do if the refrigerator does not cool

Before calling a technician, follow these steps. In 30% of cases, the problem is solved without repair.

Step 1: Defrost the refrigerator completely

Even if you No Frost, complete defrosting for 24-48 hours can be eliminated:

• 🧊 Ice plugs in the capillary.
• ❄️ Fan freezing.
• 💧 Blockages in the drainage system.

How to defrost correctly:

1. Unplug the refrigerator.
2. Take out all the food.
3. Leave the doors open.
4. Place containers to collect water.
5. After 12 hours, wipe all surfaces dry with a rag.
6. Wait another 12 hours (total defrosting is 24 hours).

What to do if after defrosting the refrigerator still does not work?

If defrosting did not help, then the problem is technical: freon leak, capillary clogged or breakdown compressor. In this case, independent repair is not recommended - contact a specialist. Attempts to “fill freon” or “clean the pipes” without experience can lead to the final failure of the refrigerator.

Step 2: Check the rubber seals

Worn or dirty seals allow warm air to pass through, which is why:

• 🌡️ The temperature in the chamber is increasing.
• ❄️ Ice is growing on the back wall (the compressor is working in enhanced mode).
• 💰 Electricity consumption is increasing.

How to check:

1. Close the door and try to stretch a piece of paper between the rubber band and the body a sheet of paper.
2. If the sheet passes easily, the seal needs to be cleaned or replaced.
3. Clean the rubber band warm soapy solution (without abrasives!).
4. If deformed, replace the seal (select according to the refrigerator model).

Step 3: Diagnose the fan (for No Frost)

If the fan is not works:

1. Unplug the refrigerator.
2. Remove the back panel in the freezer (usually secured with latches or screws).
3. Check whether ice is blocking the blades. If so, defrost the refrigerator.
4. Turn the blades by hand - they should rotate easily, without squeaking.
5. Connect the refrigerator and listen to whether the fan turns on. If not, check the power with a multimeter.

Step 4: Check the thermostat

To check the thermostat:

1. Disconnect refrigerator.
2. Remove the protective cover (usually located next to the temperature control knob).
3. Disconnect the thermostat terminals.
4. Put the multimeter into continuity mode and check the contacts.
5. If the contacts are open at room temperature - The thermostat is faulty.

Step 5: Evaluate the operation of the compressor

If the compressor:

• 🔇 Does not turn on at all - check the thermostat, start relay, electronic module.
• 🔊 It hums, but does not cool - possible freon leak or capillary blockage.
• 🔥 Overheats —a malfunction of the starting relay or an interturn short circuit in the winding.

For diagnostics relay:

1. Turn off the refrigerator.
2. Remove the relay (usually attached to the compressor).
3. Shake it - if you hear a knock, it means the contacts have oxidized or broken.
4. Ring with a multimeter to check for break.

When to call a repairman: 5 signs of a serious breakdown

Some breakdowns cannot be repaired on your own. Contact a specialist if:

1. The refrigerator does not cool after complete defrosting.
   

   This indicates a freon leak, capillary blockage or compressor failure - professional diagnostics are required.

2. The compressor works, but does not create pressure.
   

   Sign of interturn short circuit or wear of the piston group. The compressor needs to be replaced.

3. The display shows an error that cannot be reset.
   

   For example, E3 in Samsung or F2 in Indesit Often indicate a malfunction of the sensors or board.

4. In a refrigerator with No Frost the fan does not spin, and the defrost heating element does not heat.
   

   Replacement of one or both elements will be required.

5. After repair, the problem returned after 1–2 weeks.
   

   This may mean that the freon leak has not been eliminated or the capillary has become clogged again.

Prevention: how to prevent repeated failures

For the refrigerator to work stably:

• 🧊 Defrost. Even for No Frost once a year, arrange a “preventive” defrost for 12–24 hours.
• 🧴 Caring for seals. Wash the rubber bands with soapy water every 2–3 months. Replace if deformed.
• 🌡️ Temperature control. Do not place the refrigerator next to the radiator or stove. Optimal room temperature - 18–22°C.
• 🍎 Correct loading. Do not place food close to the back wall - this interferes with air circulation.
• ⚡ Stable power supply. Use a surge protector to protect against power surges.

For models with No Frost additionally:

• 🔄 Once every 6 months, clean the ventilation holes inside the chambers.
• 💨 Make sure that the products do not blocked the air flow.

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

Manufacturers claim that No Frost does not require defrosting. However, in practice, once a year it is still recommended to turn off the refrigerator for 12–24 hours to remove condensation and clean the system. This extends the service life of the fan and defrost heating element.

FAQ: Frequently asked questions

Is it possible to refill freon yourself?

Technically it is possible, but not recommended. For refueling you need:

• Vacuum pump (to remove moisture from the system).
• Gauge manifold (for pressure control).
• The exact amount of freon (depending on the model).

An error in dosage or moisture ingress will lead to re-clogging of the capillary. It is better to entrust this to a specialist.

Why does the refrigerator not turn on after defrosting?

Possible reasons:

• It worked thermal protection compressor (wait 1-2 hours).
• Failed thermostat or start relay.
• Problems with electronic module (required diagnostics).

Try turning off the refrigerator for 10 minutes, then turning it on again. If it doesn’t help, call a specialist.

How much does it cost to repair if the refrigerator compartment does not work?

The cost depends on the breakdown (prices are relevant for Moscow and the regions for 2026):

Type of repair	Cost (₽)
Replacing the thermostat	1 500 – 3 000
Cleaning the capillary tube + refilling freon	3 500 – 6 000
Replacing the No Frost fan	2 000 – 4 500
Replacing the compressor	5 000 – 12 000
Repairing the electronic module	2 500 – 8 000

In the provinces, prices may be 20–30% higher below. Check the cost with local service centers.

Can the refrigerator not cool due to power surges?

Yes. Sudden voltage changes can:

• Damage electronic module.
• Burn compressor (especially in older models).
• Damage start relay.

Use voltage stabilizer or surge protector with protection against impulse noise.

What to do if the refrigerator is under warranty?

If the refrigerator is under warranty:

1. Do not disassemble it yourself - this will void the warranty.
2. Contact authorized service center (addresses are indicated in the warranty card).
3. Inform the model, serial number and describe the problem.
4. If the technician confirms manufacturing defect, the repair will be free.

The warranty period for refrigerators is usually 1–3 years (depending on the manufacturer).

⚠️ Attention: If your refrigerator was manufactured before 2010, it may use refrigerant R-12 or R-22, which are prohibited from production due to harm to the ozone layer. If freon leaks, the technician is obliged to replace it with a modern analogue (for example, R-134a or R-600a). Check this before repairing.