The situation when you open the refrigerator door, and it’s warm inside, can take anyone by surprise. The internal lighting works, the compressor may hum or, conversely, be silent, but the products begin to deteriorate. Lack of cooling This is a critical failure that requires an immediate response, but it does not always mean an expensive repair.
Before calling a technician or looking for a service center, it is important to carry out an initial diagnosis. Often the reason lies in trivial things: a power outage, incorrect position of the temperature regulator, or a banal overload of the chambers with products. Understanding the principles of operation of the refrigeration circuit will help you save time and money.
In this article we will analyze in detail the main reasons why the equipment has ceased to perform its function, and we will determine which problems can be solved independently, and where the intervention of a professional with a license to work with refrigerants will be required.
Primary diagnostics: electricity and settings
The very first step is checking basic things. Make sure that the power cord is firmly plugged into the outlet and that there is electricity in the area. Sometimes the problem lies not in the refrigerator, but in a power surge, which could knock out the automatic fuse in the panel or damage the power filter.
Check the temperature settings. If one of the household members accidentally moves the regulator to the “0” or “Off” position, the compressor simply will not start. Modern models with electronic control are characterized by a situation where the program has gone wrong or a software failure has occurred.
⚠️ Attention: If you notice a burning smell or melted insulation on the plug, immediately disconnect the device from the network and do not try to turn it on again until you check the wiring.
It is also worth assessing the tightness of the door. If the seal is dirty or damaged, cold air will escape and the unit will run idle, not achieving the set parameters.
☑️ Initial service check
After performing these simple steps, give the equipment time. If you just defrosted your refrigerator or moved it, it may not start freezing right away. It takes time for the oil in the compressor to stabilize and return to operating mode.
Problems with the compressor and start relay
Compressor are the heart of the refrigerator. If it doesn't start, there won't be any cold. Signs of a malfunction may vary: silence, humming without starting, or frequent clicking. Often the culprit is the starting relay, which sends an impulse to start the motor.
If you hear a characteristic click, followed by a hum that lasts a few seconds, and then another click and silence, this is a sure sign that the engine is trying to start, but cannot. In this case, it is often necessary to replace the starting relay or the compressor itself if it is jammed.
- 🔌 Symptom: The compressor is hot, but does not work - the thermal protection relay may have tripped.
- 🔊 Symptom: A metallic clanging sound is heard when trying to start - mechanical failure inside motor.
- 📉 Symptom: Complete absence of operating sounds when the light is on - an open circuit or a burnt-out control module.
Replacing a compressor is a complex procedure that requires evacuation of the system and charging with freon. It is impossible to do it yourself without special equipment.
Is it possible to replace the compressor yourself?
Theoretically, yes, if you have the skills to solder copper pipes, a vacuum pump and a pressure gauge station. However, for a household user this is not economically feasible and dangerous due to the high pressure in the system.
In some cases, the problem is solved by replacing the start relay, which is inexpensive and can be done by a person with minimal technical skills. The main thing is to choose a relay with exactly the same characteristics as the original.
Freon leak: how to detect and what to do
The refrigerant (freon) circulates through the system, transferring heat. If a microcrack forms in the circuit, the gas gradually evaporates. Freon leak is one of the most common reasons why the refrigerator works, but does not freeze. The compressor hums continuously, trying to raise the temperature, but there is no effect.
It is difficult to determine a leak visually, since freon is colorless and odorless. However, indirect signs may indicate a problem: swelling of the wall of the refrigerator compartment, the appearance of oily stains near the compressor or on the floor under the equipment.
| Symptom | Probability of leakage | Actions |
|---|---|---|
| The compressor works without stops | High | Call a technician to look for leaks |
| Frost only at the evaporator | Medium | Check defrost operation |
| Heat in both chambers | High | Do not turn on, repair needed |
| Oil stain under equipment | Critical | Urgent circuit repair |
If there is suspicion of The leak has been confirmed and the equipment cannot be used. Operating a compressor without a sufficient amount of refrigerant leads to its overheating and other failure.
⚠️ Attention: Freon, although considered relatively safe, can form toxic compounds in a confined space when in contact with an open fire. Ventilate the room when a leak is detected.
Restoring the tightness and charging the system is a task for the service center. The technician will find the location of the damage, seal it and charge the required amount of refrigerant according to the model data sheet.
Malfunctions of the No Frost and defrost system
In refrigerators with the system No Frost the fan is responsible for the circulation of cold air, and the defrost system is responsible for the absence of ice. If the refrigerator is humming, the light is on, but there is no cold, the evaporator may be frozen.
The defrost heating element, temperature sensor or timer may fail. As a result, ice freezes on the evaporator, blocking the air supply channels. The fan either stops or drives warm air because the channels are clogged with ice.
- ❄️ Cause: The defrost heating element is faulty - the ice does not melt in the defrost cycle.
- 🌡️ Cause: The defrost sensor is broken - the system "does not know" what is needed warm.
- 🌀 Cause: The fan does not work - the cold does not enter the chamber.
You can diagnose the problem by completely defrosting the refrigerator. Leave it turned off with the doors open for 24 hours. If, after turning it on, it starts to freeze normally, but after a week the problem returns, it means that one of the elements of the defrosting system is faulty.
Replacing a heating element or sensor usually does not take much time and does not requires complex equipment, unlike repairing a compressor. However, getting to these nodes in No Frost models often requires disassembling the internal lining.
Clogged capillary tube and filter drier
There are bottlenecks in the refrigerant circulation system - the capillary tube and filter drier. Over time, they may become clogged due to oil oxidation products or moisture entering the circuit. This phenomenon is called hydraulic blockage.
Signs of a blockage are similar to a freon leak: the compressor works, but there is little or no cold. However, if clogged, the condenser (grid at the back) may be hot only at the beginning or, conversely, cold, and the filter-drier may become covered with frost.
To eliminate this malfunction, you need to:
- Opening the circuit and replacing the filter-drier.
- Blowing the capillary tubes with nitrogen under high pressure.
- Evacuating the system and refilling with freon.
This procedure is technically complex and requires professional tools. It is impossible to clean the capillary yourself without opening the system.
It is important to understand that blockage is often a consequence of long-term use or poor-quality previous repairs, when moisture got into the system or the wrong oil was used.
When a call is necessary masters
There is a clear boundary between what the user can do himself and what requires the intervention of a professional. If the problem concerns the electrical part (replacing a lamp, checking the socket) or simple defrosting, proceed with confidence.
However, any manipulations that require depressurization of the circuit, working with high voltage inside the compressor, or complex disassembly of the housing with the risk of damaging the plastic are best left to specialists. Incorrect actions can lead to final breakdown of the unit.
In addition, authorized service centers have access to original spare parts and diagrams for specific models Indesit, Atlant, Bosch and other brands. They also provide a guarantee for the work performed.
Do not ignore the first signs of a malfunction. Timely repairs are often cheaper than replacing the compressor or buying a new refrigerator.
Why does the refrigerator freeze but does not turn off?
This may indicate a freon leak, a clogged capillary tube, or worn out door seal. The compressor wears out, trying to compensate for the loss of cold.
Is it possible to use a refrigerator if it does not freeze well?
Short-term - yes, but this will lead to excessive energy consumption and accelerated wear of the compressor. Food in such a chamber will deteriorate faster.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require manual defrosting to remove ice, but experts recommend preventive defrosting and washing 1-2 times a year for hygiene and operating efficiency.
What to do if the refrigerator is defrosted after defrosting does not turn on?
Check the integrity of the cord and the presence of voltage. If everything is in order, the start relay may have failed or the compressor has burned out due to an attempt to start with liquid freon (if turned on too early).