A sudden stop of the refrigeration chamber or the main unit is always stressful for the owner, because food supplies are at risk. When you open the door and it’s already warm inside, or, conversely, the freezer has turned into a block of ice, the first reaction is panic. However refrigerator malfunction does not always mean expensive repairs or the purchase of new equipment. Often the problem lies in small things that you can fix yourself in a matter of minutes.
Before calling a technician, you need to carry out an initial diagnosis. Modern models Bosch, LG, Samsung or simpler domestic ones Atlant i Biryusa have similar principles of operation of the compressor and heat removal system. Understanding the basic logic of the device will help you quickly navigate the situation. In this article we will look in detail why the refrigerator stopped freezingmakes strange sounds or simply does not turn on.
Ignoring the first signs of failure can lead to failure of expensive components, such as a compressor. If you notice that the unit is operating intermittently, you should not wait for a complete failure. The most critical symptom is the complete failure of the compressor to start when there is voltage in the network, which often indicates a burnt-out starter mechanism or a broken winding. Let's look at the main scenarios for the behavior of the equipment.
Problems with power supply and external factors
The most common, but common reason is the lack of electricity. It may seem too obvious to check the outlet, but service center statistics indicate otherwise. If The refrigerator does not turn on, first of all make sure that the plug fits tightly in the socket. Often, due to vibration, the contact weakens, and the equipment goes into standby mode or is completely de-energized.
It is also worth checking the condition of the power cord. Pets and small children can damage the insulation or chew the wire. Visual inspection of the cable along its entire length will help identify visible defects. If the cord is intact, try plugging another device into the same outlet, for example, a lamp or hair dryer, to eliminate problems with the electrical network itself in the apartment.
- ⚡ Check whether the circuit breaker in the panel has been knocked out, especially if powerful devices were connected to the network.
- 🔌 Inspect the plug for melted contacts or mechanical damage enclosure.
- 💡 Make sure there is light in the house, as problems may be associated with a power outage in the entire area.
⚠️ Attention: If you smell something burning or see sparking in the area of the outlet, immediately stop trying to turn it on and call an electrician. Using damaged wiring is dangerous to life.
In some cases, the problem lies not in the house, but in power surges. Power surges can damage the electronic control board, especially in models with a digital display. If after turning on the lights in the apartment the equipment is silent, the fuse or control module may have burned out. In such situations, independent repairs without special knowledge and equipment are not recommended.
Malfunctions of the thermostat and sensors
If everything is in order with the electricity, but the cold is not generated, you should pay attention to thermostat. This device is responsible for maintaining the set temperature inside the chambers. In older models it is a mechanical “twist”, in new ones it is an electronic sensor. If the thermostat breaks down, the compressor simply does not receive a signal to start, and the refrigerator is “idled.”
You can diagnose a mechanical regulator in a simple way. Disconnect the equipment from the mains, remove the regulator handle and carefully remove its body. Close the two wires going to the terminals by twisting (observing safety precautions!). If the compressor starts working after being plugged into the network, it means thermostat it is faulty and requires replacement. This is a consumable item that is easy to find in spare parts stores.
In modern models with a system No Frost or Full No Frost air sensors are responsible for the temperature. Their breakdown is often accompanied by erroneous readings on the display or chaotic turning on and off of the motor. The electronics may “think” that the chamber is already colder than it actually is and does not start the cooling cycle.
- 🌡️ If the temperature sensor is faulty, the chamber may not cool at all or, on the contrary, freeze the food.
- 🔧 Replacing the thermostat requires disassembling the control panel, be careful with plastic latches.
- 📉 If the refrigerator works without stopping, the sensor may be “stuck” in the “on” position.
How to check the sensor with a multimeter?
To check the sensor, you need to remove it and “ring” it with a tester. When the temperature changes (for example, if you hold the sensor in your hand), the resistance should change. If the readings stay the same, the part is faulty.
Problems with the compressor and start relay
The heart of any refrigerator is compressor. It is he who pumps the refrigerant through the pipe system. If you hear the engine struggling to start, humming for a few seconds, clicking and then going silent, this is a classic sign of a problem with the start relay or the compressor itself. A relay is a small box that is placed on the motor contacts and gives the initial impulse to start.
When the starting relay fails, the contacts burn out and current stops flowing to the motor winding at the right time. Replacing this part is an inexpensive procedure and quite accessible to a person with minimal skills in working with tools. However, if after replacing the relay the situation has not changed, the problem may be more serious: compressor jamming or interturn short circuit of the winding.
The table below shows the main symptoms and probable causes of problems with the motor group:
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Silent, does not respond to light | No power, wiring burned out | Low |
| Buzzes for 5-10 seconds and clicks | Faulty starting relay | Medium |
| Buzzes constantly without turning off | Freon leakage, compressor wear | High |
| The motor housing gets very hot | Piston group jamming | Replacing the compressor |
⚠️ Attention: If the compressor is hot to the touch (temperature above 90 degrees), under no circumstances try to force it to start. This may lead to a winding fire or a refrigerant explosion.
☑️ Compressor diagnostics
Refrigerant leak and system blockage
If the motor runs smoothly, without jerking or stopping, hums as usual, but there is no cold - most likely it has occurred freon leak or formed clogging in the capillary tube. Refrigerant is a gas that circulates in a closed circuit. Unlike oil in a car, it does not need to be “refilled” periodically. If the freon is gone, it means that a microcrack has formed somewhere.
Often leaks occur in the place where the housing is foaming (internal evaporators) or in the heating circuit of the door perimeter. It's difficult to notice visually. A sign may be swelling of the inner wall of the refrigerator compartment or the appearance of rust on the rear grille. Clogged system often due to moisture entering the circuit during poor-quality previous repairs, or due to oil breakdown products.
You can diagnose a leak by the temperature of the condenser (black grille at the back). During normal operation it should be hot evenly. If only part of the grille is hot (for example, a third), and the rest is cold, there is a lack of refrigerant or a blockage in the system. It is impossible to eliminate such a problem on your own: you need to vacuum the system, search for leaks and refill with new gas.
- 💨 Freon leakage is dangerous not only for products, but also for health if the gas ignites (isobutane).
- 🧊 When the capillary tube is clogged, the pressure in the system increases, which increases the load on the compressor.
- 🔍 The location of the leak can often only be detected using a leak detector or soap solution with the foam removed.
Faults of the defrost system (No Frost)
Owners of refrigerators with the system No Frost often They are faced with a situation where a “fur coat” builds up in the freezer compartment, and, on the contrary, it is warm in the refrigerator compartment. The Defrost heating element, timer (or electronic module) and defrost sensorare responsible for defrosting the evaporator. If any of these elements fails, the ice does not melt, blocks the cold air supply channels, and circulation stops.
You can check the heating element visually: if the filament burned out, it will be visibly torn. Sensor