Why the light is on in the refrigerator, but it does not cool: 7 reasons and what to do

The situation is familiar to many: you open the refrigerator door, the light inside comes on, but the motor does not start, and the food begin to deteriorate. Why does the light bulb work, but the refrigerator does not? This problem occurs in models of all brands - from budget Biryusa to premium Liebherr. The reasons can be both trivial (the socket was knocked out) and serious (the compressor burned out).

In this article we will analyze all possible malfunctions - from simple to complex, we will learn how to diagnose them without calling a specialist and will tell you in which cases do-it-yourself repair is possible, and when it is better to immediately call the service center center. We will pay special attention to models with the No Frost system - they have specific “weak points” that few people know about.

First, let’s exclude the obvious: check if the lights in the whole house have been turned off or if the machine on the panel has tripped. If everything is in order with the electricity, but the refrigerator is silent, we proceed to detailed diagnostics.

1. Problems with power supply: what to check first

Start with the basics - power source. Often, users spend months looking for a breakdown inside the refrigerator, and the problem lies in the socket or surge protector. Here's what you need to do:

• 🔌 Check the socket: connect another device to it (for example, a phone charger). If it does not work, the problem is in the socket or machine.
• 🔋 Inspect the power cord: there should be no kinks, melted areas or bite marks (especially if there are animals at home).
• ⚡ Make sure that the plug is firmly inserted: sometimes the contacts oxidize, and the connection becomes unreliable.
• 🛠️ Check the machine in the panel: if it works, turn it on again. If it knocks out repeatedly, call an electrician.

If the refrigerator is connected through an extension cord or surge protector - connect it directly to the outlet. Many filters have built-in protection that can be triggered during power surges, blocking the power.

Pay attention to voltage indicator (if it is on the refrigerator panel). On models Samsung RB or LG DoorCooling+ at low voltage, the red indicator may light up - this is a signal that the compressor will not start until the network is stabilized.

2. Thermostat malfunction: how to check and replace

Thermostat (or thermostat) is the “brain” of the refrigerator, which controls the temperature and sends a signal to the compressor to turn on. If it breaks, the light will be on (since it is connected separately), and the motor will be silent. Signs of a thermostat malfunction:

• ❄️ The refrigerator does not turn on, but there is light inside.
• 🔄 The compressor starts for a few seconds and immediately turns off.
• 🌡️ B there is ice in the freezer, but it is warm in the main compartment (or vice versa - depending on the model).

To check the thermostat, do the following:

1. Unplug the refrigerator.
2. Remove the plastic cover inside the chamber (usually secured with latches).
3. Find the thermostat - it is looks like a small box with a tube going to the evaporator.
4. Disconnect the terminals and connect them together (for example, with a screwdriver). If the compressor starts working, the thermostat is faulty.

On models with electronic control (for example, Bosch KGE39XW20 or Indesit DF 4180), the thermostat can be built into the board. In this case, diagnostics are more complicated - you will need a multimeter to check the resistance.

⚠️ Attention: On refrigerators with a system No Frost the thermostat is often combined with a defrost sensor. If you close the terminals incorrectly, you can burn the control board. It’s better to take a picture of the connection diagram first.

3. Failure of the start-up relay: symptoms and repair

Start protection relay is a small “assistant” of the compressor that starts it and protects it from overheating. If the relay is burned out, the compressor will not be able to start, although the light bulb will work (it is connected in parallel). Signs of a malfunction:

• 🔊 The compressor tries to start, but only makes clicking noises.
• 🔥 The relay gets hot or smells like burning.
• 🕒 The refrigerator does not turns on after a power outage.

To check the relay:

1. Turn off the refrigerator and remove the back cover (on some models the relay is hidden behind a plastic panel at the bottom).
2. Find the relay - this is a black box attached to the compressor.
3. Remove the relay and shake it. If a knock is heard, the core has broken off inside, the part must be replaced.
4. Test the coil with a multimeter: the resistance should be in the range of 20–40 Ohms (for exact values, see the manual for the model).

On models Atlant i Stinol relays often fail due to power surges. If you live in an area with an unstable network, after replacing the relay, install voltage stabilizer - this will extend the life of the refrigerator.

4. The compressor burned out: how to determine and what to do

Compressor - this is the “heart” of the refrigerator. If it burns out, the light bulb will be on (it is powered separately), and the unit itself will be silent. Signs of a burnt out compressor:

• 🔇 Complete silence - not even a relay click.
• 🔥 The compressor housing is very hot (but not always).
• 💡 On some models the red error indicator is on (for example, E1 on LG).

To check the compressor:

1. Turn off the refrigerator and touch the compressor (it is located at the bottom back). If it is cold, there may be a problem in the relay or thermostat.
2. Ring the windings multimeter:
   • Resistance between terminals C-S (working winding) - 15–30 Ohms.
   • Resistance between C-R (start winding) - 20–40 Ohms.
   • Resistance between S-R is the sum of the two previous values.

If the resistance is 0 (short circuit) or infinity (open) - the compressor has burned out.

On refrigerators with inverter compressors (for example, Samsung Digital Inverter), diagnostics are more complicated - special equipment is required. Self-repair here is almost impossible.

⚠️ Attention: If the compressor burns out due to an interturn short circuit, replacing it will cost 50–70% of the cost of a new refrigerator. In this case, it is more advisable to buy new equipment, especially if your model is more than 7-10 years old.

5. Problems with the control board: when you can’t do without a master

In modern electronically controlled refrigerators (Bosch Serie 6, Electrolux NutriFresh) the compressor is responsible for starting control board. If it fails, the light comes on (since it is connected directly), but the motor does not start. Signs of a board malfunction:

• 📛 An error appears on the display (for example, F5 on Samsung or E01 on LG).
• 🔄 The refrigerator turns on and off spontaneously.
• 🎛️ The buttons on the panel do not respond or work only once.

It is almost impossible to repair the board yourself - you need soldering equipment and a connection diagram. However, you can try the following steps:

1. Unplug the refrigerator for 10–15 minutes (sometimes resetting the settings helps).
2. Check the contacts on the board - they could have oxidized or come loose.
3. If burnt elements (blackened or swollen) are visible on the board, it needs to be replaced.

On models Whirlpool and Beko boards often fail due to power surges. If you do not have a stabilizer, install it, even if the board has already been replaced.

What to do if the board “died” after a thunderstorm?

If the refrigerator is connected to the network during a thunderstorm, the board may burn out from a surge. In this case, the warranty is usually not valid (this is considered “force majeure”). Try contacting the service center with a request for a discounted repair - some centers will accommodate you.

6. Capillary tube clogged or freon leakage.

If the compressor works, but the refrigerator does not cool, the problem may lie in freon circulation system. Twin scenarios:

1. Clogged capillary tube: over time, dirt accumulates in the system, which blocks the flow of freon. The compressor hums, but cools. no.
2. Freon leak: if the tubes are damaged (for example, due to corrosion), gas comes out and the refrigerator stops freezing.

Signs of problems with freon:

• 🔊 The compressor works without stopping, but does not cool.
• 🧊 The condenser (grid at the back) does not heat up.
• 💧 There are oily stains on the floor under the refrigerator (a sign of a leak).

It is impossible to eliminate these faults on your own - special equipment is required for vacuuming and refilling freon. However, you can check:

• 🔍 Inspect the back wall of the refrigerator to see if there are any traces of corrosion on the tubes.
• 👂 Put your ear to the compressor: if it hums, but does not “pump” (no pulsation in the tubes) - a blockage is possible.

⚠️ Attention: If you suspect a freon leak, do not turn on the refrigerator for a long time - this can lead to overheating of the compressor and its final breakdown. It is better to call a technician immediately.

7. why the light is on but the refrigerator is not

It seems absurd, but sometimes the problem lies in door switch. On many models (Zanussi ZRT 20100 WA, Gorenje RK 4181) this switch is responsible not only for the light, but also for the signal about the closed door. If it breaks, the refrigerator “thinks” that the door is open and does not start. compressor.

How to check the switch:

1. Find the switch - it is located next to the light bulb, inside the housing.
2. Press it manually (the door should be open). works.
3. If the light does not go out or the switch is stuck, it needs to be replaced.

On some models Samsung the switch is integrated into the control board. In this case, replacing it requires disassembling the panel - it is better to entrust this to a specialist.

What to do if the refrigerator does not work and the light is on: a step-by-step plan

Let's summarize all of the above in a checklist for quick diagnostics:

If at some stage you discover a malfunction, but are not confident in your abilities - don’t take risksFor example, replacing a compressor or refilling freon requires special skills, having previously specified the cost. repairs.

For models older than 10 years, repairs may be unprofitable. In this case, it makes sense to consider purchasing a new refrigerator - modern models (for example, Liebherr Premium or Bosch Serie 8) consume 2-3 times less electricity, which will recoup their cost in a few years.

FAQ: Frequently asked questions about a non-working refrigerator

The refrigerator does not freeze, but the light is on - could the socket be to blame?

Yes, this is the first thing you need to check. Connect another device to the socket (for example, a hair dryer or charger. If it does not work, there is a problem). socket or machine. Also check if the RCD has tripped - it may turn off when there is a current leak. differential machine (RCD) - it can turn off when there is a current leak.

The compressor clicks, but does not start What is it?

Most likely. faulty start-protective relay or the compressor itself. Try lightly tapping the relay (sometimes it helps to temporarily restore contact). If this does not help, the relay needs to be replaced. If after replacing the relay the compressor still does not start, most likely the motor winding has burned out.

On the display refrigerator error E1 is on. What should I do?

Error E1 on most models (Samsung, LG, Indesit) means a problem with temperature sensor or the control board. Try turning off the refrigerator for 10 minutes - sometimes this clears the error. If the error persists, the board needs to be diagnosed or replaced. sensor.

Is it possible to fill the refrigerator with freon yourself?

Theoretically it is possible, but in practice it is extremely risky. For refilling you need vacuum pump, pressure manifold accurate scales for freon dosage. or moisture entering the system will lead to re-clogging. It is better to entrust this to professionals.

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

The cost depends on the model and type compressor:

• Replacement of a conventional compressor: 8,000–15,000 ₽ (including work).
• Replacement of an inverter compressor: 15,000–25,000 ₽.
• Refilling freon: 3 000–6,000 ₽.

For refrigerators older than 10 years, repairs are often unprofitable - a new unit will cost 25,000–40,000 ₽, but will last longer.