The situation when you open the refrigerator door, and there is room temperature, always takes you by surprise. Products begin to deteriorate, and panic arises, because calling a specialist can be expensive or take a long time. However, in many cases troubleshooting the owner himself can do it if he approaches the matter calmly and consistently. Do not rush to look for the service center number, first try to carry out an initial diagnosis.
Before disassembling the unit, make sure that the problem is really a breakdown, and not a banal lack of electricity or accidentally lost settings. Often the reason for the lack of cold is the chamber being overloaded with food or the door not being tightly closed. If you have checked the obvious things, but compressor it buzzes, but does not start, or is completely silent, then a deeper intervention will be required. In this article we will analyze the main breakdown scenarios and methods for eliminating them.
It is important to understand that modern models, be it Indesit, Atlant or Bosch, have similar operating principles, but may differ in design nuances. Your task is to localize the problem in order to understand whether you can fix the device yourself or whether complex components will still need to be replaced. Self-repair will save a significant amount if the breakdown does not require special tools for working with refrigerant.
⚠️ Attention: Before starting any diagnostic and repair work, be sure to disconnect the refrigerator from the power supply. Working with electrical appliances under voltage is deadly!
Primary diagnosis: why there is no cold
The most common mistake is to start disassembling without checking the operation thermostat. If the temperature control knob is accidentally turned to the “0” or “Off” position, the compressor simply will not receive a signal to start. Check if the light inside the chamber is on when the door is open. If there is no light, check the socket and plug; there may be a problem in the apartment wiring or the extension cord to which the unit is connected.
Pay attention to the nature of the motor operation. If it turns on for a couple of seconds, hums and clicks, and then turns off, this is a sign of a problem with the start relay or the compressor itself. In the case when the motor runs constantly, but there is no cold, most likely the capillary tube has become clogged or clogged. It is also worth listening for any extraneous sounds, such as gurgling or hissing, which may indicate refrigerant circulation. freon leak or the capillary tube is clogged. It is also worth listening for any extraneous sounds, such as gurgling or hissing, that may indicate refrigerant circulation.
Check the tightness sealing rubber along the perimeter of the door. If the rubber is dry, cracked or simply dirty, warm air enters the chamber. The compressor tries to compensate for the heat by working without interruption, but due to the constant load it does not have time to freeze the food to the desired temperature. A simple test with a sheet of paper will help determine the tightness: clamp the sheet with the door and try to pull it out - it should come out with noticeable force.
Checking the thermostat and temperature sensors
Thermostat (or thermostat) is a device that controls the temperature inside the chamber and sends a command to turn it on or off compressor. If it fails, the refrigerator may either not turn on at all, or it may work without stopping, turning food into ice blocks. In mechanical models, this is a simple “twist”; in electronic models, it is a complex sensor that transmits data to the control module. To check a mechanical thermostat, it is usually removed from the chamber and the contacts are closed directly. If after this procedure the compressor starts working, then the problem is in the regulator. In models with the system control module.
To test a mechanical thermostat, it is usually removed from the chamber and the contacts are closed directly. If after this procedure the compressor starts working, then the problem is in the regulator. In models with the system No Frost defrost or evaporator sensors often fail. The electronics receive incorrect temperature data and do not start the cooling cycle, believing that the chamber is already cold enough.
Replacing the thermostat is a simple procedure. You need to remove the protective cover, disconnect the wires (after photographing their location) and install a new part. It is important to choose an analogue with identical parameters, since different models are designed for different temperature ranges. An error in selection can lead to incorrect operation of the entire unit.
⚠️ Attention: The characteristics of sensors and thermostats may vary depending on the specific model and year of manufacture. Always check the part markings with the manufacturer's documentation before installation.
Diagnostics of the starting relay and compressor
If, when you turn it on, you hear a click, the motor hums for 5-10 seconds and the shutdown click is heard again - these are classic symptoms of a malfunction. start relay. This device starts the compressor motor. Inside the relay there is a coil and contacts that burn or stick over time. Fortunately, this is one of the easiest and cheapest parts to replace.
To check the relay, you need to remove it from the side of the compressor (usually it is covered with a plastic cap). Shake it: if something rattles inside, it means the core is broken and the part needs to be replaced. You can also “ring” the contacts with a multimeter. If the relay is working properly, but the compressor still does not start or immediately knocks out the circuit breaker, the problem may be in the windings of the of the electric motor motor itself or its mechanical jamming.
Replacing a compressor is a complex process that requires special equipment for pumping out old freon, evacuation of the system and charging new refrigerant. If the diagnosis confirms the death of the motor, self-repair is only possible if you have the skills to work with refrigeration equipment. Otherwise, it is more economically feasible to call a technician or consider buying a new refrigerator.
☑️ Checking the start relay
Problems with defrosting in the No Frost system
In refrigerators with the system No Frost ice does not form on the walls of the chamber, since moisture is removed through drainage, and the evaporator is hidden behind the back panel. If this system fails, ice blocks the fans and air ducts. As a result, the chamber is warm, although the compressor may be running. The main culprits here are defrost heating element, defrost timer or defrost sensor.
For diagnostics, you will need to remove the back plastic panel in the freezer. If you see a huge lump of ice completely covering the evaporator, the defrost system has failed. It is necessary to “ring” the heating element with a multimeter: if it does not show resistance (break), it needs to be changed. Also check the defrost sensor, which should open the heating element circuit when a certain temperature is reached.
Often the cause is a clogged drain hole. The water from the melting ice does not have time to leave and freezes, forming an ice plug. You can clean the channel using warm water and soft wire or a special brush. Regular prevention helps to avoid such situations.
How to defrost a refrigerator correctly?
To completely defrost the No Frost system, you may need to unplug the refrigerator for at least 12-24 hours. Do not use a hair dryer or other heating devices to speed up the process - this may damage the plastic parts and lead to cracks in the evaporator. Just leave the doors open, place towels to catch the water, and be patient.
Freon leak and clogged capillary system
If the compressor is running continuously, the radiator grille at the back (condenser) is only partially cold or warm, and the inside of the refrigerator is warm - these are sure signs. refrigerant leaks or blockage. Freon is a working fluid that transfers heat. If there is little of it or it does not circulate, cooling does not occur. Finding the location of the leak yourself without special equipment (leak detector) is almost impossible.
Clogged capillary tube often occurs due to moisture in the system or compressor wear products. In this case, one part of the capacitor will be hot and the other cold. Sometimes “pushing” the system with pressure helps, but this is a temporary measure. A complete repair requires evacuation, replacement of the filter-drier and refilling with the exact amount of freon.
Refilling yourself with freon without evacuating the system will lead to the fact that the remaining moisture and air will cause blockage capillary with ice after several hours or days of operation. Therefore, if you do not have a professional tool, if you suspect a leak or blockage, it is better to contact the service.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor does not turn on, there is no light | No power, burnt out cord | Low |
| Buzzes, clicks and turns off | Faulty starting relay | Low |
| Works constantly, no cold | Freon leak, blockage | High (needs a technician) |
| Ice build-up in No Frost | The heating element or timer has burned out | Medium |
| Heat in one of the chambers | The damper or fan is faulty | Medium |
Repair and replacement of sealing rubber
Loss of tightness is an insidious problem. The refrigerator seems to be freezing, but it does so for a very long time and intermittently. Over time, the rubber loses elasticity, cracks or moves away from the body. If the deformation is minor, you can try to restore the seal. Remove it, soak it in hot water (about 70-80 degrees) for a few minutes to make it softer, and straighten it by hand.
If the rubber is torn or severely deformed, it must be replaced. A new tape is purchased strictly for your refrigerator model. Installation takes a little time: you need to carefully insert the edge of the new rubber band into the groove along the entire perimeter of the door. It is important that the magnetic tape inside the rubber fits tightly to the metal of the case.
After replacement, check the fit of the door. It should close with a characteristic pop, but without excessive force. If the door is askew, the hinges may need to be adjusted. Loosen the mounting bolts, level the door and tighten them back. This will ensure proper operation seal and extend the life of the compressor.
Frequently asked questions (FAQ)
Why does the refrigerator hum, but does not freeze after defrosting?
Most likely, there is a blockage in the system or an air lock has formed. It is also possible that during defrosting you damaged the evaporator or did not allow the system to dry completely before turning it on. Let the refrigerator stand turned off for a few more hours.
Is it possible to use old-style refrigerators with R12 freon?
You can use it, but R12 freon (Freon-12) is prohibited from production due to harm to the ozone layer. If a leak occurs, refilling will require switching the system to a modern analogue (for example, R134a) with an oil change, which only a master can do.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require regular defrosting to remove ice. However, once every year or two it is recommended to turn off the refrigerator for hygienic washing and cleaning the drainage system from dust and bacteria.
What to do if a puddle has formed at the bottom of the refrigerator?
Check the drainage hole inside the chamber - it could be clogged with crumbs. Also, a puddle may appear due to the skew of the refrigerator (check the legs) or a crack in the condensate tray at the back.