A sudden breakdown of household appliances always causes panic, especially when it comes to the safety of products. Indesit refrigerator is a reliable unit, but it is also subject to wear, which can lead to an increase in temperature in the chambers or complete system failure. Primary diagnostics allows you to understand whether it is worth calling a technician or whether the problem can be solved yourself.
Before starting complex disassembly, it is necessary to conduct a basic check of the operation of the device. Owners often confuse a temporary shutdown in defrost mode with a real malfunction. Italian technology has its own operating characteristics of electronics and mechanics that must be taken into account when assessing its condition.
In this article we will analyze all stages of testing, from simple visual inspections to using a multimeter. You will learn how to distinguish a thermostat failure from problems with the compressor and what to look for first. The correct one diagnosis will save you time and money on unnecessary repairs.
Initial visual inspection and power check
The very first and obvious step is to make sure that the refrigerator is receiving electricity at all. If indicator lamp the inside of the camera does not light up when the door is opened, and the fan (if there is one) is silent, the problem may be trivial. Check whether the plug fits tightly into the socket and whether the circuit breaker on the panel has not burned out.
Carefully inspect the power cord along its entire length. There should be no creases, traces of melting or damage to the insulation, especially at the exit points from the housing and plug. A damaged cable can create an intermittent connection, causing the refrigerator to turn on and off.
⚠️ Attention: Before any inspection of internal components, make sure that the plug is unplugged from the outlet. Working with live electrical circuits is deadly.
If everything is in order with the socket and cord, but the equipment is silent, try plugging another device into the same socket, for example, a hair dryer or lamp. This will eliminate the malfunction of the electrical network itself in the apartment. Sometimes the problem lies not in the refrigerator, but in the wiring.
Pay attention to the lighting inside the chamber. If the light is on, it means voltage is being supplied to the board or mechanics. In models with electronic control display should light or flash. Lack of interface response in the presence of light often indicates a failure of the control board.
Diagnostics of the compressor and start relay
The heart of any refrigerator is compressor. If you hear a quiet hum, but there is no cold, or the engine tries to start, clicks and goes silent, these are signs of a malfunction of the start relay or the engine itself. Normally, the compressor should operate cyclically: turn on, cool the chamber and turn off.
To check, you need to gain access to the rear of the unit. Remove the protective cover (crankcase) at the bottom of the refrigerator. There you will see a black cylindrical or pear-shaped motor-compressor. Carefully touch it (if it is not hot) and listen.
- 🔊 Uniform humming: The compressor is working normally, the problem may be a freon leak or a clogged capillary tube.
- 🔊 Clicks and silence: The starting relay or motor winding is faulty burned out.
- 🔊 Loud knocking or vibration: The internal mountings of the motor may have collapsed or it is touching the cabinet walls.
The starting relay is a small plastic block placed on the side rod compressor. It is this that provides the impulse to start the engine. If the relay makes frequent clicks but does not start, it should be replaced. This is one of the most common reasons why Indesit refrigerator stops freezing.
If the compressor is hot to the touch, but does not start, this is a bad sign. Most likely, a thermal breakdown or jamming of the piston group occurred. In this case, independent repair is practically impossible; replacement of the unit is required.
Checking the thermostat and temperature sensors
The thermostat (or temperature sensor in models with electronics) is responsible for turning the compressor on and off depending on the temperature inside the chambers. If this element fails, the refrigerator may either work without interruption or not turn on at all.
In mechanical models, the thermostat is a device with a long sensitive tube, which is fixed inside the chamber. To check it, you need to remove the regulator handle and the unit itself. Next, using a multimeter in the dialing mode, the contacts are checked.
| Contact state | Multimeter readings | Action |
|---|---|---|
| Closed (normal) | There is a sound signal / 0 Ohm | Thermostat is working |
| Open | No signal / infinity | Replacing the thermostat |
| Short circuit | 0 Ohm at any temperature | Replacing the thermostat |
For accurate diagnostics, the mechanical thermostat can be placed in the cold (for example, in the freezer) for 15-20 minutes, after first disconnecting it from the refrigerator. After cooling, the contacts should click and close. If this does not happen, the part requires replacement.
Modern models Indesit No Frost use air sensors. Their resistance changes depending on temperature. The test is carried out with a multimeter: at room temperature the resistance is usually several kOhms, and when cooled it should increase. If the resistance does not change or shows a break, the sensor is faulty.
☑️ Checking the thermostat
Assessing the operation of the defrost system (No Frost)
If your refrigerator is equipped with a system No Frost, but a “fur coat” or ice crust has formed inside, which means the defrosting cycle is broken. In such models, the evaporator is hidden behind a plastic panel in the freezer, and it is difficult to visually assess its condition without disassembling it.
The main elements of the defrost system are a heating element (heating element), a defrost sensor and a timer (or electronic control module). If the heating element burns out, the ice on the evaporator does not melt, the air channels become clogged, and cold stops flowing into the main chamber.
Signs of a faulty defrost system:
- ❄️ A layer of ice or frost is visible on the back wall of the freezer.
- ❄️ The refrigerator hums longer than usual or works non-stop.
- ❄️ In the main chamber the temperature is higher than normal, although the freezer is freezing.
The heating element is checked by testing its coils with a multimeter. The resistance of a working heater is usually in the range from 200 to 400 ohms. If the device shows a break, the heating element must be changed. It is also worth checking the integrity of the wires going to the heater, as they often burn out from high temperatures.
Hidden cause of ice in No Frost
Sometimes ice forms not because of a broken heating element, but because the door is not tightly closed. Warm, humid air enters, condenses and freezes on the cold evaporator, creating excess load on the defrost system.
Checking the tightness and condition of the seals
Even a working compressor will not be able to maintain a low temperature if the chamber is not sealed. Rubber seal doors with Over time, it loses elasticity, cracks or deforms, letting warm air in.
There is a simple and effective way to check the tightness of the door. Take a regular sheet of A4 paper. Clamp it with the refrigerator door around the perimeter in different places. If the sheet is removed easily, without resistance, it means that the seal does not fit in this place.
Inspect the rubber for the presence of:
- 🧐 Cracks, tears and abrasions.
- 🧐 Mold or black plaque that destroys the structure rubber.
- 🧐 Food residues or crumbs that interfere with tight closure.
If the seal is simply dirty, it is enough to wash it with warm water and soap. If it has lost its shape, you can try to restore its elasticity by heating it with a hairdryer or soaking it in hot water. However, if there is mechanical damage, only a complete replacement of the belt will help.
⚠️ Attention: A loose door seal causes the compressor to work continuously, trying to compensate for heat loss. This leads to overheating of the motor and a significant increase in electricity consumption.
Analysis of sound signals and error codes
Modern refrigerators Indesit are equipped with a self-diagnosis system. When a malfunction occurs, indicators on the control panel may light up or lights may flash in a certain sequence. These signals are the key to quick diagnosis.
For example, a flashing temperature indicator often indicates that the temperature in the chamber has risen above the permissible limit. This may be the result of either a recent load of warm food or a serious breakdown. If the blinking continues for more than 24 hours, you need to look for a malfunction.
Some models may emit beeps. One long beep may indicate defrosting, while intermittent beeps may indicate an open door or sensor error. It is best to look for the decoding of specific codes for your model in the instructions, since for different series Indesit indication may differ.
Frequently asked questions (FAQ)
Why does the Indesit refrigerator hum but not freeze?
Most often this indicates a refrigerant (freon) leak or a blockage of the capillary system. The compressor is running, but gas is not circulating through the circuit. There may also be a malfunction of the compressor itself, which hums but does not create pressure.
How often should the refrigerator turn on and off?
In normal mode, the operating cycle is approximately: 10-15 minutes of work and 20-30 minutes of rest. However, these values depend on the room temperature, the load on the chambers and the installed cooling power.
Is it possible to operate a refrigerator if it is not level?
It is extremely undesirable. Misalignment can lead to improper operation of the door (it will open on its own) and disruption of oil circulation in the compressor, which will shorten its service life. Always use adjustable feet for leveling.
What to do if there is water inside the refrigerator?
First, check the drainage hole on the back wall. It could become clogged with debris or ice. Clean it with a special stick or soft wire. Also check to see if the drain tube has moved.
Is it safe to change the starting relay yourself?
Yes, if you follow safety precautions and disconnect the device from the network. Replacing a relay is one of the simplest operations. The main thing is to correctly remove the old relay and install a new one, making sure that it is securely fixed to the compressor rod.