The refrigerator does not freeze, but the engine is running: 7 reasons and what to do

You are standing in front of an open refrigerator, and inside there is room temperature, although the motor is clearly humming and even heating up. Is the situation familiar? This is one of the most common malfunctions that owners of equipment Atlant, Indesit, Samsung and other brands encounter. In 80% of cases, the problem is solved without calling a technician - it is enough to correctly diagnose the cause.

In this article we will look at why the refrigerator engine is running, but the chambers are not cooling - from banal icing of the evaporator to serious compressor breakdowns. You will learn how to independently check the thermostat, sensors, cooling circuit and when exactly it is time to call a specialist. And at the end of the article - all possible reasons, in which the refrigerator engine runs, but the chambers do not cool - from banal icing of the evaporator to serious compressor breakdowns. You will learn how to independently check the thermostat, sensors, cooling circuit and when exactly it is time to call a specialist. And at the end of the article - step-by-step instructions how to eliminate each malfunction with checklists and warnings about typical errors.

Spoiler: in 6 out of 10 cases it is to blame not the engine itself, and related elements of the system. And this is good news - their repair is cheaper than replacing the compressor.

1. Freon leakage is the most common cause

Freon (refrigerant) is the “blood” of the refrigeration system. If its quantity drops below a critical level, the compressor runs idle: it circulates almost empty gas around the circuit, but no cooling occurs. Signs of a leak:

• 🔊 The engine runs without stopping or with very short pauses
• ❄️ Condenser (rear grille) barely warm, although it should warm up
• 💧 Oil on the floor under the refrigerator (if there is a leak in the compressor)
• 🧊 The freezer thaws first, then the refrigerator

Where leaks most often occur:

1. Lockring connections (places soldering tubes) - 45% of cases. Over time, the solder cracks from vibrations.
2. Evaporator (in models with No Frost) - 30%. Corrosion of aluminum tubes due to condensation.
3. Capacitor — 15%. Mechanical damage (for example, during transportation).
4. Compressor — 10%. Cracks in the body (usually in old refrigerators).

⚠️ Attention: If the leak occurs in the foamed part (for example, in the wall of the refrigerator), repairs will cost 50-70% of the cost of a new device. In such cases, the technician usually suggests complete replacement of the refrigerator.

How to check for freon leaks at home?

The easiest way is tactile: unplug the refrigerator for 10-12 hours (so that the pressure in the system drops). Then turn it on and immediately touch thin tubegoing from the compressor to the condenser. If it is does not heat up at all in the first 2-3 minutes, there is no freon in the system or there is critically little of it. In a working refrigerator, the tube should become hot in 30–60 seconds.

2. Clogged capillary tube or filter drier

The capillary tube is the “artery” of the refrigerator through which freon enters the evaporator. Its diameter is comparable to a fishing line (0.6–0.8 mm), and the slightest contamination leads to blocking refrigerant circulation. Causes of blockages:

• 🔧 Metal shavings after unqualified repairs
• 🧂 Oil crystals (if the refrigerator has been idle for a long time)
• 💨 Moisture, frozen in the filter-drier (if the system was not properly evacuated)

How the blockage manifests itself:

🔧 What to do: Clogged capillary is a 100% case for the master. It is impossible to clean the system yourself without special equipment (hydraulic press, nitrogen). Average repair cost: 3 500–7 000 ₽ (including replacing the filter drier and refilling with freon).

3. Malfunction of the thermostat or electronic unit

The thermostat (in mechanical models) or electronic controller (in modern refrigerators) is responsible for turning on/off the compressor. If the sensor is lying or the control unit is “buggy”, the motor can work continuously, but there will be no cooling.

How to check the thermostat:

1. Disconnect the refrigerator from the power supply.
2. Remove the protective cover from the thermostat (usually located next to the lamp or on the back wall).
3. Find two wires going to the thermostat and connect them together (for example, with a screwdriver).
4. Turn on the refrigerator. If the compressor starts, the thermostat is faulty.

📌 Signs of a malfunction of the electronic unit:

• 📱 The display shows an error (for example, E1, F2 —see the instructions for the model)
• 🔄 The compressor turns on at 5–10 seconds and turns off
• 🎛 Control buttons do not respond or work every other time

⚠️ Attention: In refrigerators Samsung with a system No Frost (models RB-30 J3200, RL-43 etc.) a common problem — evaporator sensor failure. It is checked with a multimeter: the resistance should be 5–7 kOhm at room temperature. If it shows “0” or “1”, the sensor needs to be replaced.

Disconnect the refrigerator from the mains

Remove the protective thermostat casing

Close the thermostat contacts with a screwdriver

Turn on the refrigerator and check the start of the compressor

If the compressor starts working, the thermostat is faulty-->

4. Compressor breakdown: when the motor is “tired”

If the compressor is buzzes, but does not create pressure, this is a sign of wear. Most often they break down:

• 🔄 Start relay —does not start the motor (clicks, but the compressor does not start)
• 🧲 Engine windings —turn-to-turn short circuit (the compressor gets hot, but does not pump freon)
• 🛢 Valves are not sealed (freon leaks back)

How to check the compressor:

1. Turn off the refrigerator and wait 10 minutes.
2. Remove the start relay (black box on the compressor).
3. Test the windings with a multimeter:
   • Resistance between C (common terminal) and S (start winding): 20–40 Ohm
   • Resistance between C and R (working winding): 10–20 Om
   • Resistance between S and R: should be infinite (if not, interturn short circuit)

💰 Repair cost:

• Replacement of the starting relay: 1 200–2 500 ₽
• Repair of windings (rewinding): 4 000–6 000 ₽ (not always justified)
• Replacement of the compressor: 8 000–15 000 ₽ (including refilling with freon)

5. Problems with the No Frost system: fan and heating element

In refrigerators with No Frost (LG, Samsung, Bosch) cooling depends not only on the compressor, but also on:

• 🌀 Fan - drives cold air through the chambers
• 🔥 Defrost heating element —defrosts the evaporator
• 🧊 Defrost sensor —controls the cycle

How to check the fan:

1. Open the freezer camera.
2. Turn the refrigerator into mode Super Freeze (if available).
3. Listen: if you can’t hear the fan noise it is broken or frozen.
4. Shine a flashlight: the blades should rotate (if not, check the power supply with a multimeter).

🔧 Typical breakdowns:

• 🍃 Icing fan —ice crust blocks the blades (defrosting is needed for 12–24 hours)
• 🔌 Open circuit of the power supply —check the fuse on the control board
• 🔄 Faulty heating element —the evaporator is covered with ice (the resistance of the heating element should be 20–60 Ohm)

⚠️ Attention: If the refrigerator No Frost stops working freezer compartment onlyand the refrigerator is still cooling, the problem is between the chambers. You can clean it yourself with a wire or a syringe with warm water. water. clogging of the drainage hole between cameras. You can clean it yourself with a wire or a syringe with warm water.

6. Violation of the seal of the chambers: seal and doors

If the chamber is constantly warm air enters, the compressor will work without stopping, but the temperature will not drop to the desired level. Causes:

• 🚪 Wear of the sealing rubber —cracks, deformation
• 🧲 The door is skewed —the hinges have become loose or the body is deformed
• 🧊 Ice on the walls - prevents tight closure (relevant for models with a drip system)

How to check the tightness:

1. Take a sheet of paper (A4 format).
2. Close the door, holding the sheet between the seal and the body.
3. Pull the sheet towards you. If it easily slipped out the seal is not sealed.
4. Repeat the test at 4-5 points around the perimeter of the door.

🛠 How to fix:

• 🔧 Elastic band can be restored: warm it with a hairdryer (temperature 60-70°C) and stretch it in deformed areas. If there are cracks - replacement only (cost: 1 500–3 000 ₽).
• 🔨 Loops tightened with a screwdriver (if the play is small) or replaced (price: 800–1 500 ₽ per pair).
• ❄️ Ice remove completely defrosting (at least 12 hours). In models No Frost ice crust on the evaporator often indicates a malfunction of defrost sensor.

7. data-i="237">If the refrigerator is new (up to 1 year old) or has been recently repaired, the problem may lie in:

If the refrigerator is new (less than 1 year old) or has recently been repaired, the problem may lie in:

• 🏭 Failure of the compressor - occurs in Indesit i Atlant (2020–2022 series) Symptom: the motor gets hot and turns off after 3–5. minutes.
• 🔧 Incorrect refilling of freon - if after repair the refrigerator worked for 1-2 days and then stopped freezing.
• 📄 Refrigerant mismatch - for example, instead of R-134a filled R-600a (this happens in “garage” workshops).

📌 What to do:

• If the refrigerator is under warranty - do not disassemble it yourself. Call a technician from the service center (by law, repairs must be free).
• If the repair was carried out unofficially, ask the technician Act of completed work indicating the type of freon and pressure in the system.
• Check refrigerator passport: the recommended refrigerant is indicated there. For example, for Samsung RL-34 this is R-134a, and for LG GA-B409 — R-600a.

FAQ: Frequently asked questions about non-working refrigerator

❓ The refrigerator stopped freezing after the power was turned off. What's wrong?

Most likely it worked compressor protection from power surges Try:

1. Unplug the refrigerator for 10–15 minutes.
2. Turn it on again. If the compressor does not start, check start relay (it may burn out from a voltage drop).
3. If the motor hums, but does not freeze - possible freon leak due to water hammer (moisture in the system froze and ruptured the tube).

💡 Advice: Use voltage stabilizer - this will prolong life compressor.

❓ Is it possible to fill freon into the refrigerator yourself?

Technically you can, but:

• 🛠 You will need vacuum pump (from 5,000 ₽), gauge manifold (from 3,000 ₽) and cylinder with freon (1 000–2 000 ₽).
• ⚠️ Danger: Freon R-600a (used in most modern models) explosive for a leak in an enclosed space.
• 📜 Violation of technology (for example, insufficient vacuumization) will lead to repeated breakdown in 1-2 months.

🔧 Conclusion: It is cheaper and safer to call a specialist. Self-refueling is only justified for refrigerators older than 15 years (for example, ZIL or Minsk).

❓ Why does the refrigerator not freeze, but the light inside is on?

This means that the problem is not in the power supply, and:

• 🧊 Thermostat (does not send a signal to the compressor).
• 🔌 Start relay (does not start the engine).
• 🌀 Fan (in models No Frost).
• 📱 Electronic unit (if the display shows error).

🔍 The first thing to do: close the thermostat contacts (see section 3). If the compressor works, change the thermostat.

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

The cost depends on the reason:

Breakage	Cost (₽)	Repair period
Replacement of the thermostat	1 500–2 500	30–60 minutes
Freon leakage (without depressurization of the housing)	3 500–6 000	2–3 hours
Capillary clogged	4 000–7 000	3–4 hours
Replacement of the compressor	8 000–15 000	4–5 hours
Repair of the electronic unit	2 000–5 000	1–2 days (if spare parts are needed)

⚠️ Attention: Prices are indicated for Moscow and the Moscow region. In regions, the cost may vary. on 20–30%.

❓ How to temporarily store food if the refrigerator is not working?

Methods depending on downtime:

• ⏳ Up to 6 hours: Pack food in cling film, wrap towel and place in a bowl of cold water (change the water every 2 hours).
• ⏳ Up to 24 hours: Use cooler bag with cold batteries or ice bottles (freeze water in plastic bottles in advance).
• ⏳ More than a day: Transfer the food to your neighbors, basement or balcony (if it is less than +10°C outside). Do not store meat, fish and dairy products without refrigeration for longer than 12 hours!

💡 Advice: If the freezer is still working, put the most perishable foods there (meat, fish) and do not open it again.