The Indesit refrigerator does not turn on and the light is on: fault diagnosis

The situation when the light is on inside the refrigeration chamber, but the unit itself is silent and does not emit the usual hum of a running motor, often causes panic. For equipment owners Indesit this is a common symptom indicating that the electrical circuit is partially intact, but the cooling system does not start. The light inside the camera only means that voltage is supplied to the network and the light bulb is working, but the current may not reach the motor or control system.

In contrast to the complete lack of reaction, when the equipment is dead, the presence of lighting narrows the search for problems. Most often, the problem lies in thermostat, start relay or the electronic control module, which blocks the start of the compressor due to sensor errors. Understanding the principle of operation of these components will help you independently determine whether you need to call a technician or whether the problem can be fixed on your own.

In this article we will analyze in detail the mechanical and electrical causes of compressor failure in models Indesit with a drip system and No Frost. You will learn how to carry out initial diagnostics without complex equipment and what to pay attention to first in order to prevent damage to products.

Primary diagnostics and voltage check

Before disassembling the back wall or removing the compressor casing, it is necessary to exclude trivial external factors. Sometimes the problem lies not in the refrigerator itself, but in the organization of power supply. If the light is on, it means that the phase is coming to the lamp, but this is not enough to start a powerful engine.

Check the socket into which the device is plugged in. Even if the light inside the refrigerator lights up, the voltage in the network may be unstable or insufficient to start the compressor. At low voltage in the network (below 190-200 Volts), modern engines may simply not start, although the low-current lamp will work normally.

⚠️ Attention: If you use an extension cord or surge protector, try connecting the refrigerator directly to a wall outlet. Poor contact in the adapter can cause a voltage drop sufficient for the lamp to glow, but not enough for the motor to operate.

It is also worth paying attention to the plug and power cord. Visually inspect them for melting or damage to the insulation. If the cord is pinched or has an internal break in one of the cores, this may lead to partial power supply to the circuit.

• 🔌 Check that the plug is firmly seated in the socket and that there is no sparking.
• 📉 Measure the voltage in the network with a multimeter if there is a suspicion of surges.
• 🔦 Make sure the lamp lights up brightly, without noticeable flickering or dim glow.

📊 How does your Indesit refrigerator behave?

The light is on, the motor is completely silent

The motor hums, but does not start

The light blinks, the motor does not works

Clicks are heard, but there is no start

Malfunction of the thermostat (thermostat)

In classic models Indesit with mechanical control, the start of the compressor is controlled thermostat. This device opens and closes an electrical circuit depending on the temperature in the chamber. If the thermostat fails in the “open” position, the engine power circuit does not close, and the light inside is on, since it is connected in parallel.

You can determine whether the thermostat is broken by its characteristic signs. If you turn the temperature control knob and there is no characteristic click and the engine does not start, this is a sure sign of a malfunction. In some cases, the contacts inside the thermostat may oxidize or burn, causing current to stop flowing to the motor windings.

To check the thermostat in models Indesit often it is necessary to remove the plastic lining inside the refrigerator compartment. Below it is the thermostat housing. If you close the contacts of the incoming and outgoing wires (after disconnecting the refrigerator from the network!), and after turning on the compressor starts working, it means thermostat requires replacement.

It is important to note that in models with electronic control, the role of a mechanical thermostat is performed by a temperature sensor that transmits a signal to the board. If such a sensor “lies” or shows that the temperature is normal, the compressor will also not turn on.

Problems with the start-up relay and compressor

One of the most common reasons why the refrigerator Indesit does not cool when the light is on is failure starting relay. This small element is mounted on the side or rear of the compressor and is necessary to start the engine. If the relay burns out, the motor windings do not receive the necessary impulse to start.

A characteristic sign of a relay malfunction is a series of clicks. You can hear the refrigerator trying to start, there is a click, then silence, and after a while the click repeats. The light in the chamber burns evenly, since this circuit does not depend on the relay. In some cases, the relay may “stick”, and then the motor will hum, but not spin, until the thermal protection turns it off.

Sequence of checking the relay:
1. Disconnect the refrigerator from the network.
2. Remove the rear crankcase from the compressor.
3. Carefully remove the starting relay from the contacts.
4. Shake the relay: if you hear the knocking of the ball inside, it is broken and requires replacement.

Itself compressor can also be the reason for the silence of the unit. If one of the motor windings burns out or an interturn breakdown occurs, the motor will not start. In such cases, the circuit breaker in the panel often knocks out or the fuse in the refrigerator itself burns out (if it is provided for in the design).

• 🔨 Check the relay for cracks, burning or melting of the housing.
• 🌡️ Feel the compressor: if it is hot, but cold, it may have jammed.
• ⚡ Measure the resistance of the motor windings with a multimeter to exclude a break.

⚠️ Attention: Replacing the start relay requires precise selection of the model. A relay from one compressor Indesit may not fit another due to differences in starting currents and mounting design.

Is it possible to temporarily start a refrigerator without a relay?

Theoretically, you can start the motor without a starting device by giving a short-term impulse, but this is dangerous and can finally finish off the compressor. Operating a refrigerator without a working relay is strictly not recommended, since the motor will operate in emergency mode and quickly overheat.

Failure of the electronic control module

Modern refrigerators Indesit, especially series No Frost and models with a display on the door, are controlled electronic module. If the light is on but the compressor does not turn on, the problem may be in the “brains” of the device. The control board could receive a voltage surge, which led to a failure in the program or burnout of the tracks responsible for starting the motor.

Electronics often react to malfunctions of other components by blocking. For example, if the defrost sensor shows a critical error, the module can prohibit the compressor from turning on to prevent breakdown. In such cases, error indicators may light up on the display or LEDs may blink.

Diagnostics of the module at home is difficult without special equipment. However, you can try to do reset errors. To do this, unplug the refrigerator for 15-20 minutes and then turn it on again. If the problem was a software failure, the unit may work.

Symptom	Possible cause in the module	Action
All are on indicators	Board firmware or power failure	Full reset
Alarm indicator flashing	Temperature sensor error	Checking sensors
The compressor hums, but does not start	No signal is sent to the relay	Replacing a module or relay
Complete silence of the electronics	The board's power supply has burned out	Electronics repair

If the problem persists after a reboot, most likely you will need to replace the electronic module or have it professionally repaired in a service laboratory. It is not recommended to solder the board yourself without a circuit diagram and experience, as you can aggravate the situation.

Faults in the No Frost system

In refrigerators Indesit with the system No Frost the lack of cold when the light is on is often associated with problems in the defrost circuit. If the evaporator is covered with ice, the air does not circulate, and the sensors may block the operation of the compressor, or, conversely, the compressor works, but there is no cold due to the ice plug.

However, if the compressor does not turn on at all, it is worth checking defrost sensor i heating element. In some operating algorithms, if the defrost sensor is stuck in heating mode or shows a short circuit, the control module may go into protection and not start the cooling cycle.

It is also worth inspecting the fan. On some models, if the evaporator fan jams, the system may block the compressor from starting to prevent the evaporator from overheating. Check whether the fan in the freezer is spinning with the door open (if the design allows) or listen to its operation.

• ❄️ Check the evaporator for the presence of excessive ice (defrosting is required).
• 🌬️ Make sure the blower fan is working properly.
• 🔌 Check the defrost heating element for a break or short circuit.

⚠️ Attention: Complete defrosting of the No Frost refrigerator within 24 hours can temporarily solve the problem if the cause was an ice jam, but this does not eliminate the cause of the sensor malfunction.

☑️ Diagnostics of the No Frost system

Unplug the refrigeratorLeave it to defrost for 24 hoursCheck the drain holeTurn it on and listen to the startup fanCheck for cold after 2 hours

Done: 0 / 5

Mechanical damage and freon leak

Although refrigerant leak (freon) usually does not affect electrical start circuit (the compressor hums, but does not cool), in modern models with inverter compressors or complex electronics, pressure sensors can block the motor from starting if there is no freon in the system.

If you hear a quiet hiss or see oily spots on the floor under the refrigerator or on the rear grille, these are signs of depressurization contour. In this case, the compressor may not turn on at all, so as not to run “dry”, which is detrimental for it.

It is also worth checking the integrity of the condenser (grid at the back). If it is damaged or heavily clogged with dust and hair, heat transfer is disrupted. Although this more often leads to constant operation of the motor, in critical overheating situations the protection can block restarting.

A freon leak is a complex repair that requires finding the location of the damage, sealing and recharging the system with specialized equipment. It is almost impossible to fix such a malfunction with your own hands.

Frequently asked questions (FAQ)

Why does the Indesit refrigerator click but does not turn on, although the light is on?

Clicks are most often produced by the starting relay or thermal protection relay. This means that voltage is coming to the motor, it is trying to start, but something is interfering (the piston is jammed, the winding is burned out, or the relay itself is faulty). The light is on because the lighting circuit is independent.

Is it possible to operate the refrigerator if it does not turn on, but there is light inside?

You can leave it on for a short time only for storing food, if it is still cold inside. However, you cannot leave it in this state for a long time, since a faulty component (for example, a closing relay) can cause overheating of the wiring or a fire.

How much does it cost to replace the starting relay with Indesit?

The cost of the relay itself is low, but the price depends on the compressor model and region. The main expense is the work of the diagnostic and on-site technician. Self-replacement is possible if you have the skills and tools.

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

If defrosting for 24 hours did not help, the problem lies in the electrical part: thermostat, relay, module or the compressor itself. It is necessary to check these components sequentially using a multimeter.