Before diagnosing a malfunction, you should decide on the type of refrigeration equipment.
Thermoelectric units break down very rarely. The most common breakdown is when the thermocouple battery runs out of power. There is usually no reason to replace the battery since it is about the same price as the unit itself.
In addition to this, sometimes in such refrigerators, the contacts get burnt, which can be repaired even by an inexperienced technician. Much more problems with compression models. If such a refrigerator does not work, there can be many reasons. Let’s talk about the most common ones.
If the device does not work when plugged in, perhaps the power supply circuit is “guilty”. This includes the socket, plug, power cord, and split contacts in the compressor compartment. Perhaps the problem is in the protective relay or the thermostat. The latter should be “tested” with a tester to find out the cause. In case of breakage, there will be no signal.
If the network which is feeding is completely serviceable, and at the start, the compressor does not switch on or it starts but immediately stops, the problem is most likely in the starting protection relay.
In almost the same situation with the serviceable mains, it takes three to five seconds to start the compressor or it does not start on the first attempt to start, you should look for the problem in the starting relay.
The unit freezes badly but reacts properly to the signals of thermoregulation. At the same time, the compressor heats up, shakes, and overheats protection activates. Relays of chemoprotection and start-up are fully functional.
The compressor motor winding should be diagnosed for inter-turn faults. If a fault occurs in the starter winding then the compressor will not start at all. However, the thermal protection and start relays will be intact. In both cases, a replacement will be required.
Another malfunction. The unit is freezing very hard, and the compressor is running without a break or its operation is interrupted by the thermal protection switch. The equipment practically does not respond to the thermostat, only turning the knob to the “0” position stops the compressor.
The latter makes much more noise than usual. At the same time, the meter shows that the electricity consumption is much higher than usual. All this indicates that the starting relay is jammed. This is quite a dangerous condition for the compressor because it leads to its overheating and burning out.
If the unit freezes poorly, the refrigerator’s thermostat is set correctly. By the moment of disconnection of the compressor, the condenser is normally warmed up so it is necessary to pull your hand away.
More often the problem is in a defective thermostat. It will have to be replaced. In some cases, it is possible to repair it. The thermostat is also broken if the unit turns on but freezes too weakly or strongly.
It does not respond to the position of the thermostat knob. However, the condenser heating and compressor humming are normal.
The unit operates on a short cycle, characterized by frequent switching off of the compressor. At that, it freezes badly, and the condenser does not have time to heat up properly at the moment of compressor switches off. The cause of such malfunction is the breakage of the thermal protection relay or thermostat.
The equipment functions on a long cycle, sometimes even continuously. In the freezer, ice appears on the section of the refrigerant pipe. At the same time, there is no ice on the opposite side. The situation is stable and does not change.
The cause of malfunction in this case is refrigerant leakage. Most likely there is a micro-crack somewhere. It is necessary to diagnose the circuit in order to find it and refill the system.
In some cases, it is possible to top up freon. All this is not recommended to do by yourself. If the refrigerator does not freeze at all, the reason may be the absence of refrigerant in the circuit. In this case, when you turn it on, you will feel a strong vibration, and the compressor will start banging and ringing when working.
The compressor cannot be repaired by itself. In some cases, repair work can cost more than a new unit, which should be taken into account.
The equipment only works on a short cycle and freezes hard. The sound of the compressor running is alarming. It is too loud as if a crunching or sobbing sound.
The reason most often lies in unskilled maintenance of the unit. There was too much refrigerant when pouring it in, causing a more concentrated “fog” of freon rather than vapor to enter the compressor.
This is extremely dangerous to the integrity of the tubes and compressor. That’s why you need to call a handyman with Chula Vista Appliance Repair Company right away. The unit is freezing too much. So much so that you have to set the thermostat box to no higher than 4.
The compressor heats up quickly and makes a lot of noise, and there may be an odor of melting insulation. This is caused by a loose bimetal plate located in the thermal protection relay.
Strong vibration, and excessive compressor noise, but otherwise normal. It is necessary to check the compressor suspension and adjust it if necessary. If this does not help, then the cause is increased wear and tear on the compressor.
You will have to think about replacing the compressor. A freezer that freezes too much indicates problems with the tightness of the door or poor-quality insulation. In the latter case, repairs are extremely difficult or even impossible.
Whether you can find the breakdown on your own or at some stage of the search, calling a handyman is up to you. Not only that, in the absence of experience disassembly and assembly of the refrigerator is better to limit the external examination and search for simple damage, and then call our master. Chula Vista Appliance Repair Company is proud to offer efficient refrigerator repair services in and around San Diego County. Our team of experts is well-equipped and ready to handle all types of refrigerator repairs, no matter how complicated they are. We strive to provide excellent repairs using only high-quality replacement parts backed by a manufacturer’s warranty, so you can rely on a refrigerator repair technician to fix the problem and make sure your machine will work properly for a long time.