Have you noticed that your refrigerator is humming non-stop? The compressor runs for hours, and sometimes it seems like it won't turn off at all? This problem is not only annoying with its constant noise, but also seriously hits your wallet - because electricity costs increase several times. Let's find out why this happens and whether it's worth sounding the alarm.

How a good refrigerator should work

Normally, the refrigerator compressor works cyclically: it turns on for 10-20 minutes, then rests for about the same amount of time or a little longer. This depends on the model, the temperature in the room and the load on the chambers. In general, the ratio of work time to rest should be approximately 1:1 or 1:2.

If the refrigerator does not turn off for hours in a row or the pause between cycles is only a few minutes - this is an alarm signal, say the masters of the service center for repairing refrigerators and household appliances serviceplus.com.ua. The equipment is working at the limit of its capabilities, trying to maintain the set temperature, but something is preventing it.

A story from a Kyiv apartment

Tetyana from Pechersk says: "Last summer, my refrigerator was constantly working — humming day and night. At first, I didn't pay attention, thinking the heat was to blame. But when the electricity bill came — almost twice as much as usual — I realized that something was wrong. The repairman found the problem in five minutes: the rubber on the door was worn out, and cold air was simply leaking out. They replaced the seal — and everything was back to normal."

This story illustrates one of the most common reasons for continuous operation — a leak. But this is far from the only option.

The main reasons for continuous operation

Worn door seal

The rubber seal on the door is the first line of defense against the cold. If it has lost its elasticity, cracked or moved away from the surface, warm air continuously penetrates inside. The refrigerator compressor is forced to work non-stop, trying to compensate for the loss of cold.

A simple test: take a sheet of paper, cover it with the door and try to pull it out. If the paper comes out easily, the seal is not doing its job.

Incorrect temperature in the room

In the summer, when the kitchen is +30°C, the refrigerator is constantly running is normal. Especially if it is located near the stove or in direct sunlight. The equipment simply physically cannot effectively cool at such a temperature difference.

Manufacturers recommend placing refrigerators in rooms with a temperature of +16...+32°C. If it is hotter, continuous operation becomes inevitable.

Problems with the cooling system

When the refrigerator hums and does not turn off, but it is not cold enough inside, most likely the problem is in the cooling system. Possible options:

• Freon leak is the most unpleasant situation. The refrigerant gradually escapes through a microcrack, the cooling efficiency drops, and the compressor tries to compensate for this by working continuously.
• Capillary tube clogging - the channel through which the freon circulates can become clogged with dirt or ice. Circulation is disrupted, cooling deteriorates.
• Thermostat malfunction - the sensor that turns off the compressor when the desired temperature is reached may "hang" and not give a command to turn it off.

Icing of the evaporator

In refrigerators with the No Frost system, automatic defrosting sometimes fails. The refrigerator does not turn off because an ice "coat" builds up on the evaporator, which blocks normal air circulation. The compressor is running at full capacity, but the cold simply cannot pass through the ice to the products.

It is interesting that the owner may not even suspect the problem - the evaporator is hidden behind the panel, and is almost invisible without disassembly.

Human factor

Sometimes the reason is banal: someone set the temperature switch to maximum, forgot to close the door all the way, or loaded a huge pot of hot borscht into the refrigerator. In such cases, the refrigerator works non-stop until it can handle the load.

Andriy from Lviv recalls: "After the party, we left the refrigerator barely covered - the bottle was in the way. In the morning, we discovered that it had been humming for eight hours in a row, and it was warm inside. It's good that we noticed quickly - otherwise the compressor could have burned out."

Seasonal factor

In summer, the question "why is the refrigerator constantly running" arises three times more often than in winter. This is natural - the higher the ambient temperature, the more intensively the cooling system has to work. If in winter the work-rest cycles are 15/30 minutes, in summer it can be 25/15 - and this is the norm.

But if even in a cool room the refrigerator is humming around the clock is already a sign of a malfunction.

When is it time to call a technician

You should not delay if:

• The refrigerator is not working for more than an hour without pauses
• It is not cold enough inside, despite continuous operation
• The compressor is overheating (it is impossible to hold your hand)
• There are extraneous sounds - clicking, cracking, an atypical hum
• Ice freezes on the back wall or around the freezer

Continuous operation of the compressor is like running a marathon without preparation. Sooner or later, the resource will run out, and instead of minor repairs, you will have to replace an expensive engine.

Prevention is better than cure

To avoid the problem, follow simple rules: regularly clean the refrigerator, check the condition of the seal, do not place it close to the wall (a gap is needed for ventilation), do not load hot, defrost the chambers in time.

Remember: a refrigerator that does not turn off is not just discomfort, but a signal that the equipment is working at the limit of its capabilities and needs your attention.