The light is on in the refrigerator, but the motor does not work - what what to do?

You opened the refrigerator, the light inside came on as usual, but the motor does not make the usual hum, and the temperature in the chambers is slowly rising? This situation is familiar to many owners of equipment Indesit, Samsung, Atlant and other brands. In 80% of cases, the problem is solved without calling a technician - it’s enough to understand its cause.

The light in the refrigerator and the operation of the motor-compressor are controlled different systems. The light bulb is connected directly to the door switch, and the motor is connected through a thermostat, relay and electronic unit. If only the light is on, this indicates a malfunction in the compressor power circuit. Let's consider all possible scenarios - from a banal failure to serious breakdowns.

Why the light works but the motor does not: 7 main reasons

Let's start with the good news: if in the refrigerator the light is on, but the compressor does not start - this almost always eliminates problems with the power supply of the outlet or the power cord. The problem lies deeper. Here is a complete list of possible reasons, from the simplest to the most complex:

• 🔌 Failure thermostat - the temperature sensor “thinks” that the chamber is already cold enough and does not send a signal to start the motor.
• ⚡ Malfunction of the start-up relay —the device that “pushes” the compressor at start has failed.
• ❄️ Icing of the evaporator (in models with No Frost) — ice blocks air circulation, the system “freezes” while waiting defrosting.
• 🔧 Failure of the compressor —the motor has burned out, jammed or lost its seal.
• 📱 Electronic unit failure (in refrigerators with a display)—the “brains” of the technician do not give the command to startup.
• 🔋 Problems with the capacitor —the element that accumulates energy to start the motor has lost capacity.
• 🛠️ Mechanical damage —for example, the fan in the system is jammed No Frost.

As you can see, there are many reasons, but most of them can be diagnosed independently. Next, we will analyze each in detail - with symptoms, testing methods and solutions.

How to check the thermostat: step-by-step instructions

The thermostat (or thermostat) is the “brain” that decides when to turn on the motor. If it is broken, the compressor simply will not receive a command to start. Signs of a malfunctioning thermostat:

• 🌡️ The refrigerator does not turn on, but the light is on.
• 🔄 The motor starts only after manually turning the thermostat knob to maximum.
• ❄️ The freezer is too cold (the thermostat is “stuck” in the “on” position).

To check the thermostat, follow these steps:

Unplug the refrigerator

Remove the thermostat knob (usually it is simply removed or unscrews)

Get to the thermostat contacts (you may need to remove the back cover)

Ring the contacts with a multimeter in resistance test mode

If there is no resistance, the thermostat is faulty-->

If the thermostat is mechanical (with a handle), it can be temporarily closed wires to bypass the compressor. But this is dangerous! The refrigerator will work without stopping until you return the thermostat to its place or turn off the power.

⚠️ Attention: In refrigerators Samsung i LG s An electronically controlled thermostat is often built into the main unit. Replacing it requires soldering work - it is better to entrust this to a specialist.

Start-protection relay: how to find out that it has burned out

A relay is a small box attached to the compressor. It performs two functions:

1. Starts the motor, giving it a short-term powerful impulse.
2. Protects the compressor from overheating, turning it off when overloaded.

Signs of a relay malfunction:

• 🔊 The compressor is trying to start (a hum is heard), but immediately turns off.
• 🔥 The relay gets hot or smells like burning.
• 🛠️ Melted areas or cracks are visible on the relay body.

You can check the relay like this:

1. Disconnect the refrigerator from the network.
2. Remove the relay from the compressor (usually it is attached to latches or one bolt).
3. Shake the relay - if something rattles inside, this is a sign of mechanical damage.
4. Ring the contacts with a multimeter (the resistance between the coil terminals should be ~50-150 Ohms).

The cost of a new relay is from 500 to 2000 rubles, depending on the model. Replacement takes 10 minutes: just remove the old relay and install a new one in its place.

The compressor does not start: what to do if the motor burns out

If the thermostat and relay are working, but the motor still does not work, the problem may be in the compressor itself. Signs of a burnt out compressor:

• 🔇 Complete silence - no clicks or buzzing.
• 🔥 The compressor housing gets very hot (normal: warm, but not hot).
• 💥 When you try to start, the machine in the panel is triggered (short circuit).

To check the compressor, perform the following steps:

1. Disconnect the refrigerator from the network.
2. Remove the start-up relay (it interferes with access to the compressor terminals).
3. Test the compressor windings with a multimeter:
   • Resistance between C (common) and S (start winding) — ~20-40 Ohm.
   • Resistance between C and R (working winding) — ~10-20 Ohm.
   • Resistance between S and R —sum two previous values (~30-60 Ohms).

If at least one value is 0 (short circuit) or ∞ (open), the compressor is faulty.

Repairing the compressor at home is almost impossible - specialized equipment is required for evacuation and refilling with freon. Cost of a new compressor — from 5000 to 15000 rubles, plus the work of a master (~3000-5000 rubles). In most cases, it is cheaper to buy a new refrigerator if the old one is more than 10 years old.

⚠️ Attention: If the compressor is jammed (the shaft does not rotate), do not try to force it to start - this can lead to a short circuit and fire. It is better to immediately call a technician for diagnostics.

Problems with the No Frost system: why the refrigerator does not freeze

In refrigerators with the system No Frost (for example, Samsung RL-34, LG GA-B489), the light may be on and the motor do not operate due to icing of the evaporator or fan failure. Here's how it manifests itself:

If your refrigerator stops freezing, start by defrosting for a day. This often helps restore work. If the problem recurs, look for the cause in the fan or defrost system. No Frost stopped freezing, start by defrosting for a day. This often helps restore work. If the problem recurs, look for the cause in the fan or defrost system.

How to defrost a No Frost refrigerator correctly?

1. Unplug the refrigerator.

2. Take out all the products and shelves.

3. Leave the doors open for 12-24 hours (the ice should melt naturally).

4. Wipe the internal surfaces with a dry cloth.

5. Turn on the refrigerator and check the operation of the fan (it should make noise in 5-10 minutes).

Do not use a hairdryer or hot water - this can damage the plastic!

Electronic control unit: when the “brains” of the refrigerator fail

In modern refrigerators (for example, Bosch KGE39XW25R, Samsung RB-30 J3200EF) the electronic unit is responsible for starting the compressor. If it fails, the motor may not turn on, although the light works. Signs of a problem with the electronics:

• 📛 An error flashes on the display (for example, E1, F2, H1).
• 🔄 The refrigerator turns on and off spontaneously.
• 🛠️ The buttons on the panel do not respond or work every once in a while.

Independent repair of the electronic unit is difficult - soldering skills and diagnostic equipment are required, however, you can try the following steps:

1. Disconnect the refrigerator from the network for 10-15 minutes (reset settings).
2. Check the density of the contacts on the board (sometimes poking the connectors helps).
3. If an error appears on the display, find its explanation in the instructions (for example, E1 v Samsung —a problem with the temperature sensor).

The cost of repairing an electronic unit is from 3,000 to 8,000 rubles. In some cases, it is cheaper to replace the entire unit (~10,000-15,000 rubles).

⚠️ Attention: If the refrigerator stops turning on after a thunderstorm, most likely the varistor on the control board has burned out, do not turn on the equipment again without checking - this may worsen the breakdown!

The capacitor and other “little things” that cause the motor to not work

The capacitor is a small “barrel” that accumulates energy to start the compressor. If it fails, the motor cannot start. Signs of a faulty one. capacitor:

• 🔊 The compressor hums, but does not start.
• 🔋 The capacitor is swollen or electrolyte liquid has leaked.
• 🛠️ When checking with a multimeter, the capacity is below the nominal value (indicated on the case).

Replacing a capacitor is easy:

1. Buy a similar capacitor (cost ~200-500 rubles).
2. Unsolder the old device, observing the polarity.
3. Solder a new capacitor.

Other “little things” that can interfere with the operation of the motor:

• 🔌 Oxidized contacts on the terminals of the compressor or relay (clean with sandpaper).
• 🔗 Breakage of the wire in the power circuit (call with a tester).
• 🛡️ Tripped circuit breaker in the shield (check if the plugs have been knocked out).

FAQ: Frequently asked questions about a non-working refrigerator motor

The refrigerator does not freeze, but the light is on and the fan is working. What is the problem?

Most likely it is faulty compressor or freon circulation system (leakage, clogged capillary tube). The fan in No Frost can operate even without cold, simply driving warm air. Check the temperature of the condenser (grid at the back) - if it is cold, there is no freon in the system.

Is it possible to start a refrigerator without a thermostat?

Technically, yes, but it is dangerous! If you close the thermostat contacts, the compressor will work without stopping until it overheats. Use this method only for a short-term test (no more than 10-15 minutes). For permanent operation, be sure to install a new one. thermostat.

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

The cost depends on the reason:

• Replacement of the thermostat - 1500-3000 rubles.
• Replacement of relay - 1000-2500 RUB
• Replacement of the compressor - 8000-15000 RUB.
• Repair of the electronic unit - 3000-8000 RUB.
• Refilling with freon - 4000-7000 RUB.

If the refrigerator is more than 10 years old, repairs may be unprofitable.

Samsung refrigerator: the light is on, the motor does not work, there is an error on the display 5EWhat to do?

Error 5E c Samsung indicates a problem with evaporator temperature sensor. Try:

1. Turn off the refrigerator for 10 minutes (error reset).
2. Check if the evaporator is frozen (defrost for 12 hours).
3. If the error remains, replace the sensor (cost ~1500-2500 rubles).

After defrosting, the refrigerator does not turn on. What to check?

First make sure that:

• The refrigerator is correctly connected to socket (try another device in this socket).
• The circuit breaker in the panel did not work.
• The door is tightly closed (in some models the motor will not start if the door is open).

If everything is in order, check the thermostat and relay - they could fail due to condensation after defrosting.