The situation when you open the door and feel what's inside heatand the food begins to deteriorate causes panic in any home cook. This is not just a household trifle, it is a threat to the entire food supply in the house. The first step is to assess the scale of the disaster: whether the device has completely turned off, or whether it is humming, but not cooling.
Before calling the customer service, you should carry out the initial diagnostics yourself. Often the reason lies in banal things that can be fixed in five minutes without calling a technician. Modern models old Soviet units have their own nuances, but the initial check algorithm is similar.
In this article we will analyze a step-by-step action plan that will help you understand whether urgent repairs are required or the problem can be solved on your own forces. It is important to act quickly and calmly to minimize losses.
Primary diagnostics: light, sound and power
The very first step is to check the electrical circuit. If the light inside the refrigerator compartment does not turn on and the fan (if there is one) is silent, the problem may be with the outlet or cord. Try plugging another device into the same outlet, for example, a hair dryer or phone charger, to make sure there is voltage.
If the light is on, but the motor is silent, listen carefully. Silence in this case may indicate a breakdown of the thermostat or start relay. However, if you hear a characteristic click, followed by a hum that lasts a few seconds, and then another click and silence, this is a sign that the 🔌 Check that the plug is firmly inserted into the socket and that there is no mechanical damage on the wire. compressor is trying to start, but cannot.
- 🔌 Check whether the plug is firmly inserted into the socket and whether there is any mechanical damage to the wire.
- 💡 Make sure that the light bulb inside is working - sometimes its burnout masks the operation of other systems.
- 🔊 Listen to the sounds: a steady hum, intermittent clicks or complete silence.
It is also important to check whether the circuit breakers in electrical panel. Power surges are a common cause of electronic failure. If you have a stabilizer installed, check its readings.
Why the refrigerator hums but does not cool
The situation when the motor runs continuously, making the usual noise, but the temperature inside does not drop, is one of the most common. In this case refrigerant (freon) has either evaporated through microcracks, or the system is clogged with oil breakdown products.
Often the cause is a malfunction of the thermostat. This element is responsible for turning the motor on and off. If it is stuck in the off position, the compressor may run empty or not turn on at all, depending on the type of design. In double-compressor models the problem can be localized only in one chamber.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately unplug the device! Further operation may lead to a fire.
Another possible reason is a blockage in the capillary tube. This is a thin tube through which freon circulates. If it becomes clogged, the pressure in the system drops and cooling stops, although the compressor continues to wear out. Only a technician with a pressure gauge can determine this for sure.
How does the cooling cycle work?
The refrigerant is compressed in the compressor, turning into a hot liquid. It then passes through the condenser (the grill at the back), cools and goes to the evaporator inside the chamber, where it boils, taking heat from the food. After this, the gas returns to the compressor again.
Problems with the No Frost system and defrosting
Owners of modern units with the system No Frost often encounter freezing of the evaporator. If the fan does not circulate air or the heating element of the heating element is burnt out, the ice coat blocks the circulation of cold air. As a result, the chambers are warm, and inside the body there is a ball of ice.
To test this hypothesis, it is enough to completely defrost the refrigerator. Leave it turned off with the doors open for at least 24 hours. If after turning on the device worked normally, but a week later the problem recurred, one of the elements of the defrosting system is faulty.
| Symptom | Possible cause | Action |
|---|---|---|
| Ice on the back wall | The defrost heating element is faulty | Replacing the heater |
| The fan is silent | The motor or sensor is burned out | Checking the power circuit |
| Water under boxes | Clogged drainage hole | Cleaning the tube |
| Noise and vibration | Ice on the fan blades | Complete defrosting |
The drainage hole also requires attention. If it is clogged with crumbs or mold, the condensation does not go into the tray, but accumulates at the bottom of the chamber or flows out. You can clean it with a soft wire or a brush.
Faults of the compressor and start relay
The heart of the refrigerator is compressor If it fails, repair often becomes economically impractical. However, before discarding the unit, it is worth checking the starting relay. This is a small part that fits onto the motor contact.
Symptoms of a faulty relay often appear as frequent clicking sounds every few minutes. The motor hums for 3-5 seconds, then there is a click and there is silence. After some time, the cycle repeats. In this case, you can replace the relay yourself if you know how to use a screwdriver.
☑️ Checking the start relay
If the compressor is hot to the touch, but does not start, an interturn short circuit of the winding may have occurred. In this case, the motor must be replaced.
⚠️ Attention: Never attempt to repair a sealed compressor casing or solder pipes without skills and tools. This is dangerous to life and health.
Freon leak: how to detect and what to do
Refrigerant leak is an insidious problem. Freon is odorless and colorless, so it is difficult to detect visually. Most often, leaks occur in places where tubes are soldered or in the foamed part of the case due to corrosion.
An indirect sign of a leak is that the capacitor (grid at the back) remains only partially cold or warm, while during normal operation it should be hot along its entire length. There may also be swelling on the side walls of the refrigerator.
If you suspect a leak, the only solution is to call a technician. He uses a leak detector or a soap solution (in rare cases) to find the location of the damage. After eliminating the hole, the system is evacuated and refilled with new gas.
Which freon is better?
Modern refrigerators are filled with freon R600a (isobutane). It is more environmentally friendly than the old R134a, but is more explosive when concentrated. Therefore, working with it requires special care and ventilation of the room.
When it is necessary to call a specialist
There are a number of situations when independent repairs are not only useless, but also dangerous. If you do not have special knowledge in the field of electrical engineering and refrigeration equipment, it is better not to take risks.
A master is needed if you need to replace the compressor, find and eliminate freon leaks, replace the electronic control module or shut-off valves. You also need a professional if, after defrosting and checking the electrical system, the problem does not disappear.
- 🛠 Soldering of copper tubes and working with an open flame is required.
- ⚡ Diagnosis of complex electronics with a multimeter is necessary.
- ❄️ It is necessary to evacuate the system and accurately fill it with refrigerant according to the scale.
Do not forget that an attempt to independently repair a complex unit can lead to the final failure of the device, and then no repair will help.
Rules for storing products in case of breakdown
While you are waiting for the technician or solving the problem, it is important to save the products. If the refrigerator is not freezing, but you have not yet unloaded all the contents, follow the safety rules. The main thing is to prevent the growth of bacteria.
Frozen products at temperatures above -6°C begin to deteriorate. If you are not planning repairs in the next few hours, it is better to transfer meat, fish and semi-finished products into thermal bags with ice or give them to neighbors. Vegetables and fruits can sit at room temperature, but dairy products require refrigeration.
⚠️ Attention: Never re-freeze defrosted foods! This is dangerous to your health. If the meat has thawed, it must be cooked immediately.
If a power outage occurs in winter, you can use the balcony, but remember that sudden temperature changes are harmful for some products. Pack them airtight to protect them from dust and insects.
How long does food remain safe in an unplugged refrigerator?
In a closed refrigerator, food remains cold for about 4 hours. In the freezer, if it is full, the temperature is maintained for up to 48 hours, if half full, for up to 24 hours. Do not open the doors unless necessary.
Can a refrigerator be stored in an unheated room?
Most manufacturers do not recommend operating refrigerators at temperatures below +5°C and above +32°C. The oil in the compressor thickens in the cold, which leads to breakdown, and the heat overloads the motor.
Why does the refrigerator take a long time to gain temperature after defrosting?
After a long defrosting and turning on, it may take 2 to 12 hours to reach operating mode. This is fine. Do not load the chambers with food until the temperature has stabilized.
What to do if an unpleasant odor appears in the refrigerator?
Use activated carbon, special odor absorbers or a bowl of soda. Wash all shelves thoroughly with a solution of vinegar or citric acid. Check the drain hole for rot.
Do you need to change the filter in the refrigerator?
If your model is equipped with an air purification system (for example, Plasmacluster or an analogue), the filter requires replacement every 1-2 years. This improves storage quality and eliminates odors. The indicator usually signals a replacement.