Situation, when freezer compartment continues to freeze food properly, but the main compartment of the refrigerator is warm or the temperature is higher than normal, this is one of the most common and insidious malfunctions. Users often ignore the first signs, believing that the equipment is simply “tired” or the room is too hot, but in fact this is a clear signal of a refrigerant circulation problem. Unlike complete equipment failure, partial loss of cold indicates that compressor is still running and trying to do its job, but the system cannot deliver cold to the desired zone.
Why does this happen? The design of most modern refrigerators, be it Indesit, Atlant or Bosch, implies that cold air is generated in the freezer compartment, and then a fan or natural convection distributes it throughout the main compartment. If this process is disrupted, the ice in the freezer builds up, and room temperature reigns on the vegetable shelves. Understanding the physics of the process will help you quickly diagnose the problem and avoid damage to a large number of products.
It is important not to panic and not immediately try to disassemble the unit, armed with wrenches. The first step is to carry out initial diagnostics, which often allows you to identify simple operating errors. Thermoregulator it may be knocked down, and the door may not be closed tightly due to small debris in the seal. Only by excluding these factors, it is worth considering complex technical breakdowns.
⚠️ Attention: If you notice that the back wall of the refrigerator is covered with a thick layer of ice (“coat”), and food is floating in the water, do not under any circumstances try to pick out the ice with a knife or other sharp object. This will lead to depressurization of the system and expensive repairs with refilling with freon.
Natural causes and operating errors
Before calling a specialist, it is worth eliminating trivial things that are often overlooked. Sometimes the problem lies not in the breakdown of parts, but in violation of operating rules. For example, if you have just placed a large pan of hot soup in the chamber, thermostat you may not have time to react, and the compressor is working hard, trying to cool the volume, but the cold does not have time to spread evenly. It is also worth checking whether the products have blocked the ventilation holes.
A frequent cause of uneven cooling is a loose fit sealing rubber to the case. If a crumb or magnet from a child's toy gets into the gap, the door will not close hermetically. As a result, warm air is constantly sucked inside, and the cooling system simply cannot cope with the heat inflow, although the freezer, which has its own insulation, continues to maintain the temperature.
Particular attention should be paid to the location of the equipment. If the refrigerator is located close to the wall or in a niche without gaps for ventilation, capacitor (the grille at the back) cannot effectively transfer heat. This causes the system to overheat and reduce cooling efficiency. It is enough to move the unit 5-10 centimeters from the wall for the situation to return to normal.
Sometimes users accidentally reset the settings in the electronic control unit. In models with No Frost you can inadvertently turn on the “Vacation” or “Super Freeze” mode, which changes the fan operation algorithm. Check the display and make sure that the set parameters correspond to your current needs.
Refrigerant problems: freon leak
One of the most likely technical reasons for the situation “the freezer is freezing, but the refrigerator is not” is partial refrigerant leak. Freon circulates in a closed circuit: first it passes through the evaporator of the freezer, where it boils and takes away heat, and then it must cool the main compartment. If a microcrack has formed in the system, the amount of gas decreases.
If there is a lack of freon, it is only enough for the first section of the circuit - the freezer. The refrigerant simply does not reach the main compartment of the refrigerator in the required volume or state of aggregation, so it is warm there. This is a classic symptom that is often confused with a compressor failure, although the motor itself may be completely fine.
Where does a leak most often occur?
Leaks often occur in the foamed part of the housing where the door perimeter heating circuit is laid, or at the junction of the copper tube and the aluminum evaporator due to corrosion. Only a technician with a leak detector can find the exact location.
It is difficult to diagnose a leak on your own, but there are indirect signs. The compressor may be running almost non-stop trying to get up to temperature, and the condenser (the grill at the back) will only be half or at the top hot. If you observe such a picture, most likely you need to search for the leak and filling the system new freon.
The restoration process is not limited to simply adding gas. The technician must find and eliminate the leak, replace the filter drier, and only refill the system after evacuating the system. Using cheap freon analogues or violating the charging technology can lead to rapid failure of the compressor.
Clogged capillary tube
Another serious malfunction that simulates symptoms of freon deficiency is clogged capillary tube. A capillary is a very thin copper tube through which liquid refrigerant flows under pressure into the evaporator. Over time, oil oxidation products, paraffin or moisture can accumulate inside the system, which turn into an ice plug.
When the capillary is clogged, the circulation of freon is disrupted. The compressor creates pressure, but the gas cannot pass through the narrow opening in the required volume. As a result, the freezer compartment may experience hypothermia or normal operation, while the temperature in the refrigerator compartment increases. Often, you can hear an unusual gurgling or humming noise, which is not typical for normal operation.
⚠️ Attention: Attempting to clean the capillary tube yourself using a compressor or nitrogen without the proper experience and equipment can lead to rupture of the tubes or damage to the compressor windings. This is work for a professional workshop.
To remove the blockage, the technician needs to cut off the capillary, purge the system with nitrogen under high pressure and, possibly, replace the filter drier. In some cases, a complete flushing of the circuit is required. If the blockage is caused by moisture (hydraulic hammer), the system requires careful evacuation for a long time.
☑️ Symptoms of capillary blockage
It is worth noting that blockages often occur after poor-quality previous repairs, if moisture got into the system or the wrong oil was used. Therefore, when purchasing used equipment or contacting a service department, it is important to clarify the service history of the unit.
Faults of the No Frost system
In refrigerators with a system No Frost (or Frost Free), cooling of the main compartment occurs due to forced air circulation. The fan drives cold air from the freezer into the refrigerator through special channels. If the fan stops or the air ducts become clogged, the cold stops flowing, although the evaporator in the freezer is working properly.
Freezing is a common cause. evaporator. The system is equipped with a defrost heating element, a timer and a defrost sensor, which periodically turn on the heating to melt the ice on the radiator. If one of these elements burns out, ice builds up and permanently blocks the fan or blocks the air supply. Visually this may not be noticeable, since the evaporator is often hidden behind a plastic panel.
To diagnose this malfunction, it is often necessary to completely defrost the refrigerator within 24 hours. If after defrosting the equipment began to work normally, but after a week or two the problem recurred, it means that one of the elements of the defrosting system is faulty. Most often, the defrost sensor itself or the defrost sensor fails. Evaporator heating element or defrost sensor.
| Faulty element | Symptom | Solution |
|---|---|---|
| Fan | Noise, rattling or silence | Replacing the motor |
| Defrosting heater | Increasing ice inside | Replacing the heater |
| Defrost sensor | Heating does not turn on | Replacing the sensor |
| Timer/Board | No transition to defrost mode | Electronic repair |
It is important to understand that in systems No Frost the condition of the door seals is critically important. If the rubber band allows air to pass through, moisture constantly enters inside, causing accelerated ice formation and overloading the defrosting system, which ultimately leads to the problem described.
Problems with the compressor and electrical system
Although less common, there is also a situation where compressor loses its performance. The engine may hum and start, but due to wear on the piston group or valves, it does not create enough pressure to pump freon through the entire circuit. The pressure is only enough for the beginning of the cycle (freezer), and then the gas does not flow. This often happens in old refrigerators or after power surges.
It is also worth paying attention to the operation of thermostat or the electronic control module. If the temperature sensor in the refrigerator compartment “lies” and sends a signal that it is already cold there, the compressor will turn off before it has time to cool the food. In two-compressor models (where each chamber has its own motor), the problem may be that the compressor of the refrigeration chamber has simply burned out, while the compressor of the freezer is working properly.
In models with inverter compressors, the problem may lie in the start relay or the control board itself. Inverters are sensitive to voltage drops, and when there are surges in the network, they can go into error, ceasing to develop the required power. Diagnosis of such systems requires special equipment to read error codes.
If you hear that the compressor is trying to start, clicks and turns off after a few seconds, this is a sign of a faulty start relay or inter-turn winding short circuit. In this case, operating the equipment is dangerous and can lead to a wiring fire.
Diagnostics and procedure
To systematize troubleshooting, we offer you an algorithm of actions. Do not immediately disassemble the unit, start with simple steps. If you find that the problem is not solved by defrosting and checking the seals, you will most likely need the intervention of a specialist with tools.
⚠️ Attention: Refrigerator manufacturers are constantly improving designs and electronic boards. The parts described in the manuals may differ from the actual parts in your model. Always check the electrical diagrams for a specific modification before starting work.
The first step should always be a complete defrost. Unplug the refrigerator, open the doors and leave it for at least 24 hours (preferably two days). This is necessary so that the ice in the hidden channels and on the evaporator completely melts. After turning on, let the equipment work for 5-7 hours without loading food.
If after defrosting the refrigerator worked like new, but after 1-3 weeks the problem returned, this is a 100% breakdown of the defrosting system (heating element, sensor, timer) in models No Frost or leakage/clogging in systems with a crying evaporator. If, even after defrosting, cold does not appear in the main chamber, but the freezer freezes, the diagnosis is more serious (leakage, compressor).
When calling a technician, try to describe the symptoms as accurately as possible: is the motor humming, is there ice on the back wall, how long ago has the problem appeared. This will help the specialist take with him the necessary spare parts and tools, which will reduce the repair time.
Frequently asked questions (FAQ)
Is it possible to operate the refrigerator if it does not freeze in the main chamber?
Short-term operation is possible, but undesirable. The compressor will work non-stop, trying to reach temperature, which will lead to overheating and eventual failure. In addition, bacteria will begin to multiply in the main chamber due to the high temperature.
How much does it cost to repair a freon leak?
The cost consists of finding the leak, soldering, replacing the filter-drier and refilling with refrigerant. The price varies depending on the model and the difficulty of accessing the leak (especially if it is in the foamed part of the case).
Why did the refrigerator work after defrosting, and then stopped again?
This is a classic sign of a malfunction of the defrost system (in No Frost) or the presence of moisture in the system (hydraulic blockage). Ice builds up again and blocks air or freon circulation. A burnt-out heating element or sensor needs to be replaced.
How to understand that the compressor has burned out?
If the motor hums but does not start, or starts for 1-2 seconds and clicks, or runs constantly but does not heat the condenser at the back, there is a high probability of a malfunction of the compressor or start relay.
Is it possible to replace freon yourself?
Theoretically, it is possible if you have the equipment (vacuum pump, pressure gauge station, scales), but without experience there is a high risk of completely ruining the equipment. The wrong dose or the presence of air in the system will kill the compressor.