The situation when you approach the kitchen, and The refrigerator does not turn oncan unsettle anyone. Silence instead of the usual hum of the motor and the absence of light inside the camera are often the first alarm bells indicating a serious failure. At this moment, it is important not to panic, but to consistently check the electrical circuit and the main components of the unit in order to understand the scale of the problem.
Often the reason lies in a banal lack of voltage or a faulty plug, but sometimes the silence of the equipment indicates the failure of expensive components, such as a compressor or an electronic control module. Understanding why the refrigerator stopped turning onwill help you make the right decision: call a technician or try to fix the problem yourself.
In this article we will analyze in detail all possible scenarios, from a simple voltage drop to a complex interturn short circuit. You will learn how to carry out an initial diagnosis and what symptoms to pay attention to in order to prevent food spoilage.
Checking the power supply and external factors
The first thing you need to do if the refrigerator does not startis to make sure there is electricity in the outlet. Sometimes the problem lies not in the equipment itself, but in the wiring of the apartment or a burnt-out plug in the panel. Try connecting another electrical appliance to the same outlet, for example, a table lamp or hair dryer, to ensure there is no voltage in the network.
It is also worth carefully inspecting the power cord and plug for mechanical damage. Kinks, melts, or marks from pet teeth may interfere with contact. If the plug is inserted into the socket too tightly or, on the contrary, dangles, this can cause sparking and lack of power at the input to the unit.
⚠️ Attention: Never try to repair a damaged power cord using simple electrical tape. This creates a risk of short circuit and fire. Replace the entire cable or contact a specialist.
In modern models with electronic control, failure to turn on may be due to a voltage surge that has “frozen” the control module. In this case, completely de-energizing the appliance for 15-20 minutes can help.
Thermostat malfunctions (thermostat)
One of the most common reasons why the refrigerator does not turn onis failure of the thermostat. This element is responsible for maintaining the set temperature and sends a signal to start the compressor. If the thermostat is “stuck” in the “off” position or simply burnt out, the engine power circuit does not close, and the equipment is silent.
In mechanical models, you can check the thermostat by closing its contacts directly. To do this, you need to remove the terminals from the sensor and connect them to each other (after disconnecting the device from the network!). If the compressor starts working after being connected to the network, then the problem is in the thermostat and it needs to be replaced.
In electronic models the situation is more complicated: here the signal is processed by the board, and the breakdown may lie in both the temperature sensor itself and the control chip. A symptom of a malfunction is often the absence of a click when turning the knob or an error indication on the display.
Where is the thermostat located?
In most models, the thermostat is located inside the refrigerator compartment, often behind a plastic panel or light bulb. In some cases, it can be placed outside, on the body, next to the temperature control knob.
Replacing a thermostat is not the most difficult procedure, but it requires care. It is important to choose an analogue with identical characteristics, otherwise refrigerator it may start working in the wrong mode, either turning on too often or not turning off at all.
Problems with the start-up relay
If you hear a quiet click, humming or an attempt to start the engine, but the refrigerator does not turn on and after a few seconds it goes quiet again, most likely the problem is in the start-protection relay. This small element, attached to the compressor housing, supplies a starting impulse to the motor windings.
Over time, the relay contacts may oxidize, and the internal coil or posistor may burn out. As a result, the relay cannot start the engine and the thermal protection is activated, opening the circuit. This is a protective mechanism that prevents combustion of the compressor itself from overload.
- 🔌 Symptoms: Characteristic knocking or clicking every few minutes, failure to start the motor, heating of the side walls in the compressor area.
- 🔧 Diagnostics: Visual inspection for burning, checking the integrity of the coil multimeter (should ring).
- 💡 Solution: Replace the relay with a new one. It is important to consider the power of the compressor and the type of refrigerant for which the relay is intended.
Sometimes the relay “sticks” in the closed state, which can lead to more serious consequences, including breakdown of the motor windings. Therefore, if you notice that the motor hums, but does not start, and at the same time gets very hot, immediately disconnect the device from the network.
Compressor malfunction
The most unpleasant situation is when the refrigerator does not turn on due to a malfunction of the very “heart” of the unit, the compressor. The motor may burn out completely (turn-to-turn short circuit) or become mechanically seized. In the first case, the motor windings do not pass current or are shorted to the housing; in the second, the piston group gets stuck and does not allow the shaft to rotate.
Diagnostics of the compressor requires the use of a multimeter. It is necessary to measure the resistance between the contacts of the windings. If the device shows infinity (open) or zero (short circuit), the motor is faulty. It is also important to check whether the winding “pierces” the housing.
| Type of malfunction | Symptoms | Possibility of repair |
|---|---|---|
| Break winding | The multimeter shows infinity, the motor does not buzzing | Compressor replacement required |
| Interturn short circuit | The circuit breaker is triggered, burning smell | Compressor replacement required |
| Wedge compressor | Strong hum, attempts to start, heating | Attempt to wedge (risky) or replacement |
| Breakdown to the housing | Electric shock when touching the housing, tripping of the RCD | Operation prohibited, replacement |
Replacing a compressor is a complex process that requires special equipment: a vacuum pump, a pressure gauge station and a torch for soldering copper tubes. It is almost impossible to do this work on your own without skills and tools.
⚠️ Attention: If you find that oil is coming out of the compressor tubes or you hear a whistle, do not turn on the refrigerator under any circumstances. This may indicate a violation of the tightness of the system, which will require not only replacing the motor, but also refilling with freon.
Failure of the electronic control module
In modern models such as LG, Samsung, Bosch or Indesit with the No Frost system, the electronic control module is responsible for turning on the compressor. If the board burns out or a software failure occurs in its operation, the start signal simply does not arrive.
The cause of the failure is often power surges in the network, moisture getting inside the case, or natural wear and tear of the elements. Symptoms can be different: from complete silence and lack of response to buttons to chaotic blinking of indicators.
Diagnostics of the module at home is difficult. You can try to visually inspect the board: often burnt elements (capacitors, resistors) are blackened or swollen. However, even if the board is visually intact, this does not guarantee its serviceability.
☑️ Diagnostics of the electronic module
Repairing the control module requires deep knowledge in electronics and the availability of circuit design. Most often, technicians suggest replacing the entire board or sending the unit to a specialized service for flashing and replacing components.
The influence of the No Frost system and defrost sensors
If you No Frost refrigerator and it does not turn on, the reason may lie in the automatic defrosting system. In such units, the start of the compressor is blocked if sensors detect an abnormal situation, for example, a malfunction of the defrost heating element or defrost sensor.
The operating logic is simple: if the system “thinks” that the evaporator is frozen tightly, it will not allow the compressor to start, so as not to overload the system. This is often accompanied by an error code on the display or a flashing temperature indicator.
You need to check:
- ❄️ Defrost sensor: Located on the evaporator, it should “ring” at a certain temperature.
- 🔥 Defrost heating element: Check for broken thread heating element.
- 💧 Drain hole: If it is clogged, the water does not drain, freezes and blocks the fan or sensors.
Often the problem is solved by completely defrosting the refrigerator within 24 hours. If, after connecting to the network, the unit started working normally, it means that a “fur coat” had formed in the system that needed to be melted.
When you need to call a technician
Understanding In addition, why the refrigerator does not turn onhelps save time, but does not always allow you to avoid a visit from a professional. If simple methods (checking the socket, defrosting) did not help, and diagnostics with a multimeter show a compressor malfunction or a freon leak, self-repair can be dangerous.
This is especially true for work related to a sealed circuit. Opening the system without subsequent evacuation and refilling with refrigerant of a strictly defined brand and weight will lead to rapid breakdown of the equipment.
⚠️ Attention: Freon used in modern refrigerators can be a fire hazard (for example, isobutane). It is necessary to carry out work on the cooling system in a well-ventilated area, away from open fire.
It is also worth contacting a specialist if you do not have the skills to work with live electrical appliances. Electricity is unforgiving of mistakes, and the risk of getting an electric shock when diagnosing internal circuits is quite high.
Remember that a qualified technician has access to original spare parts and can provide a guarantee for the repairs performed, which is an important factor in the event of a complex breakdown.
Frequently asked questions (FAQ)
Why does the refrigerator click but does not turn on?
The clicking noise is usually produced by a thermal relay or start relay, trying to start the compressor. If startup does not occur, the compressor may have jammed, the start relay has burned out, or the voltage in the network has dropped below the permissible level.
Can a refrigerator not turn on due to low voltage?
Yes, modern compressors are sensitive to voltage changes. If the network is less than 190-200 Volts, the engine may hum but not start, which will quickly lead to overheating and combustion. It is recommended to use a voltage stabilizer.
How long should the refrigerator stand after transportation before turning it on?
If the refrigerator was transported lying down, it needs to stand upright for at least 4-8 hours (preferably a day) so that the oil flows back into the compressor. If standing, 2-3 hours is enough.
The light is on, but the refrigerator does not work. What is the reason?
This means that power is supplied to the unit, but the compressor starting circuit does not work. Probable causes: the thermostat, the start relay or the compressor itself is faulty. The light bulb is powered in parallel and does not depend on the operation of the motor.
Is it dangerous to leave the refrigerator turned off for a long time?
Long-term downtime (months) without operation can lead to drying out of the rubber seals and corrosion of the internal tubes of the system, especially if there is moisture left in them. It is recommended to periodically (every six months) turn on the unit for several hours.