The situation when the refrigerator compartment stops cooling or, conversely, turns into an ice bunker, always takes you by surprise. Food begins to spoil, and the family is left without food supplies. However, it is too early to panic: in many cases, the fault lies in specific components that can be diagnosed and even replaced independently. Understanding the principles of operation refrigerator compartment will allow you to save significant money on calling a technician.
Before disassembling the unit, it is necessary to carry out initial diagnostics. Often the reason lies not in a compressor failure or freon leak, but in a banal malfunction of the thermostat or a broken door seal. If you notice that in the chamber Atlant or Indesit the “fur coat” is freezing on only one side, or the temperature is jumping sharply, this is a signal to action. In this article we will analyze the main causes of failures and methods for eliminating them.
Any work related to electrical components should be carried out only after the device has been completely disconnected from the network. It is also worth considering that modern models with the system No Frost have a more complex design than older single-compressor units and require a more careful approach when disassembling.
Primary diagnosis of camera malfunctions
Repair should begin with a visual inspection and analysis of symptoms. If the chamber does not freeze, but the light inside is on and the compressor is silent, the problem may be in the thermostat. When the engine hums, but there is no cold, it is worth checking the operation of the evaporator. In models with drip system the drainage hole is often clogged, which leads to increased humidity and disruption of heat transfer.
Pay attention to the operation of the fan in No Frost systems. If it doesn't spin, cold air doesn't circulate through the chamber, and food in the top drawers may defrost while everything below is frozen. The check is carried out by listening to the operation of the unit: a characteristic wind noise should be heard immediately after the compressor stops.
You should also check the integrity of the sealing gum. Even a microscopic crack or a loose cuff in the corner of the door results in a constant flow of warm, moist air. This forces the compressor to work without interruption, trying to compensate for heat loss.
Replacing the thermostat and temperature sensors
The thermostat is the “brain” that commands the compressor to turn on or off. If the refrigerator compartment Bosch or LG stops turning off and turns into a freezer, or does not turn on at all, the suspect is primarily on the thermostat. Replacing it is one of the most common DIY repair procedures.
To replace it, you need to remove the plastic cover where the regulator handle is attached and unscrew the fixing screws. The capillary tube of the sensor is carefully removed from the chamber. When installing a new element, it is important not to bend the tube, since there is a sensitive gas or liquid inside that is responsible for reacting to temperature.
- 🔧 Disconnect the refrigerator from the power supply and remove the back cover in the chamber (or plastic thermostat casing).
- 🔧 Take a photo of the wire connection diagram before disconnecting them, so as not to mix up the contacts when assembly.
- 🔧 Install a new thermostat by carefully inserting the capillary tube into its original place, and check the tightness of the fit.
Repair of the defrost system and evaporator heating elements
If you find a huge lump of ice in the refrigerator compartment Samsung or Stinol and the food is frozen to the walls, most likely the defrost system has failed. In No Frost units, a combination is responsible for this: an evaporator heating element, a defrost sensor and a timer (or electronic module). If the heating element burns out, the evaporator becomes overgrown with ice, blocking the air channels.
The heating element is checked with a multimeter in resistance measurement mode. The normal value should be between 200–300 ohms. If the device shows a break (one or zero depending on the tester model), the heating element must be replaced. Also, the fuse in the heating element circuit often fails.
The replacement process requires complete defrosting of the refrigerator within 24 hours. After this, the back panel in the freezer compartment (or in the main one, depending on the design) is removed and access to the evaporator is opened. The ice is carefully removed and the burnt elements are replaced.
| Component | Fault symptom | Check method | Normal value |
|---|---|---|---|
| Heating element defrost | Ice build-up on the evaporator | Ringing with a multimeter | 200–300 Ohm |
| Defrost sensor | The defrost does not turn on or heats up constantly | Resistance measurement at t° | Depends on temperature |
| Defrost timer | The refrigerator does not go into defrost mode | Forced start | Click and start the heating element |
| Fan | Noise, lack of cold in the chamber | Visual inspection and scrolling | Free rotation |
Why you can’t beat off the ice with a knife?
Mechanical removal of ice with sharp objects can lead to puncture of the evaporator. The system contains refrigerant under pressure, and its immediate release, combined with a spark from an impact, can be dangerous. In addition, repairing the evaporator is a complex and expensive sealing process.
Restoring the door tightness and replacing the seal
A frequent reason why the temperature in the main chamber of the refrigerator Liebherr or Beko increases is is a loose fit of the door. Over time, the rubber seal (cuff) loses elasticity, cracks or becomes deformed. You can check the tightness with a simple test with a sheet of paper: clamp the sheet with the door around the perimeter; if it is pulled out without effort, the seal is broken.
If the deformation is insignificant, you can try to restore the shape of the seal. To do this, carefully pull it back and warm it with a hairdryer, after which it is allowed to cool in the straightened state. It also helps to place a rope of foam rubber or soft wire under the rubber cuff in places where there are gaps.
In case of severe damage, a complete replacement of the seal is required. The new profile is selected strictly according to the refrigerator model. Installation is carried out in the door groove, starting from the top corner. It is important to carefully straighten all the corners so that there are no gaps left.
☑️ Checking the door tightness
Removing blockages in the drainage system
In refrigerators with a drip moisture removal system (crying wall), water flows down the back wall into the gutter and leaves through drainage hole. If this hole becomes clogged with crumbs, mold or ice, water will begin to pool at the bottom of the chamber or, worse, drip onto the floor. This creates the feeling that the refrigerator is “drip.”
To clean it, you need to remove the lower shelves and get to the hole in the lower part of the back wall. Using a special brush or soft wire with cotton wool, carefully push through the clog. Do not use sharp objects to avoid damaging the plastic channel.
After mechanical cleaning, it is recommended to rinse the drain with warm water with the addition of a mild detergent or soda. This will help eliminate odor and organic residues. If the water drains freely and quickly, the problem is solved.
⚠️ Attention: If after cleaning the water continues to stagnate, the drainage tube inside the case may have frozen or the tilt of the refrigerator has been disrupted. Make sure the unit is level, with a slight tilt back for proper drainage.
Light bulb replacement and lighting repair
Although the absence of light does not directly affect the temperature, it is an important element of comfort and diagnostics. If the lamp in the refrigerator compartment Ariston or Haier burns out, it is easy to replace. Old models used incandescent lamps, new ones used LED modules.
Removing the lampshade usually does not require tools: it is held on by latches. It is enough to carefully pry it off with a flat screwdriver or knife (being careful not to chip the plastic). If a base lamp is used, it is simply unscrewed. If there is an LED board, it can be secured with screws or double-sided tape.
When replacing, it is important to observe the power and type of lamp. Using an incandescent lamp that is too powerful can lead to melting of the lampshade and incorrect operation of the thermostat, since it may “think” that the chamber is warmer than it actually is.
Frequently asked questions and answers (FAQ)
Why does ice freeze in the fridge compartment only on one side?
This may indicate a malfunction of the cold air supply damper (in two-chamber models) or that food is lying close to the back wall, blocking the circulation. A local leak of freon in the circuit running along this wall is also possible.
Is it possible to operate the refrigerator if the lamp shade is broken?
For a short time - yes, but not recommended. Shards of plastic can get into food, and an open cartridge is dangerous in humid conditions. It is better to immediately replace or temporarily seal the hole with tape before purchasing a spare part.
How often do you need to defrost a refrigerator with a No Frost system?
Technically, the No Frost system does not require defrosting to remove ice. However, once every 6–12 months, it is recommended to carry out a complete defrost for hygienic washing, cleaning drainage and removing odors.
What to do if, after replacing the seal, the door still does not fit?
Check the door hinges. Over time, they could weaken or bend under the weight of food. It may be necessary to adjust the position of the door or replace the hinges themselves.
⚠️ Attention: Technical characteristics and location of components may vary depending on the specific model and year of manufacture. Before starting disassembly, check the official diagram of your device, as the design may have unique features.