When starting the refrigerator: how long should the compressor work?

You bought a new refrigerator or moved the old one to a new location, plugged it into the network - and here the questions begin. How long should the compressor run without stopping? Is it normal for it not to turn off for an hour, two, or even longer? And if it turns off too quickly, is this a sign of a breakdown? The answers depend on many factors: the model of the refrigerator, the room temperature, the load on the chambers and even the type of refrigerant.

In this article we will figure out how long a refrigerator compressor can work when first started, which cycles are considered normal, and when to sound the alarm. We will analyze data for different types of refrigerators (inverter, linear, systems), talk about the influence of external conditions and provide a checklist for self-diagnosis. If you have just installed equipment or noticed unusual behavior, you will find exact guidelines here. No Frost), we will talk about the influence of external conditions and provide a checklist for self-diagnosis. If you have just installed equipment or noticed unusual behavior, you will find precise guidelines here.

Why does the compressor take a long time to run when first turned on?

Starting the refrigerator for the first time is always stressful for the system. The compressor should not only cool the air inside the chambers, but bring the temperature to the specified level (usually +4...+5°C in the main chamber and −18°C in the freezer). In this case, keep in mind:

• 🔥 Room temperature. If the refrigerator is turned on in a hot kitchen (+25°C and above), the compressor will have to work longer than in a cool basement (+18°C). The difference can reach 30–50% of the time.
• ❄️ Initial temperature inside the chambers. A new or defrosted refrigerator has an ambient temperature. The freezer needs to drop from +20°C to −18°C - this takes several hours.
• 📦 Loading products. An empty refrigerator will cool faster than one filled with warm foods (especially liquids in open containers).
• ⚙️ Compressor type. Inverter models (for example, LG Inverter Linear or Samsung Digital Inverter) work smoothly, but may not turn off for 8–12 hours. Linear (classic) are usually cyclical: 20–30 minutes of work, 10–15 minutes of rest.

On average When first started, the compressor of a new refrigerator can work without stopping for 2 to 8 hours. is the norm. Continuous operation for more than 12 hours is considered critical (provided that the doors are closed and the room temperature is not higher than +30°C). If the compressor does not turn off longer, there may be problems with the thermostat, a freon leak, or a clogged capillary tube.

Compressor operating standards for different types of refrigerators

There is no universal answer to the question "how long should it work compressor". It all depends on refrigerator design i operating conditions. Below we provide approximate data for popular types of equipment.

Important: the data in the table is approximate. The actual time depends on the model, thermostat settings and even the quality of the door seals. For example, refrigerators Liebherr with the system BioFresh may work longer due to additional cooling zones.

⚠️ Attention: If your refrigerator is equipped with a function Super Freeze or Fast Cool, the compressor will work without stopping for up to 24 hours - this is normal. Turn off the mode after reaching the desired temperature.

How to check if the compressor is working normally?

To understand if there is a problem, perform simple diagnostics:

Make sure that the refrigerator is level (check the level or rock it diagonally)|

Close the door and listen: there should be a uniform hum, without clicks or knocks|

Check the temperature in the chambers after 6-8 hours: the main one should be +4...+5°C, freezer -18°C|

Count the cycles: if the compressor turns off more than once every 5 minutes or works for more than 12 hours - look for the reason|

If the refrigerator is new, let it work for a day without intervention. Modern models (for example, Samsung RB37J5000 or Bosch KGE39XW2AR) can calibrate the system for up to 24 hours. During this time:

• 🚫 Do not open the door unless necessary.
• 🌡️ Do not adjust the thermostat manually.
• ❄️ Do not load warm food (especially liquids).

After the temperature has stabilized the compressor should go into cyclic mode. For inverter models this is almost silent operation with rare shutdowns, for linear —clear work/rest intervals.

What to do if the compressor runs for too long?

If the compressor does not turn off for more than 12 hours (for inverter ones - more than 24 hours), check the following points:

1. Room temperature. At +30°C and above, the refrigerator may can't handle the load. Try moving it to a cooler place or turning on the air conditioner.
2. Door seals. Check for any gaps: place a sheet of paper on the seal and close the door. If the sheet is pulled out without resistance, the seal is worn out.
3. Loading products. Remove all warm dishes and liquids in open containers. They increase humidity and load on the system.
4. Operating mode. Disable functions Super Cool or Holiday Modeif they are activated.
5. Ventilation. Make sure that the rear grille is not blocked by furniture (there must be at least 5 cm of free space).

If after checking the compressor still does not turn off, technical malfunctions are possible:

• 🔧 Thermostat failure (does not give a signal to shutdown).
• 💨 Freon leak (the compressor runs "idle").
• 🔌 Starting fault relay (the compressor cannot stop).
• 🧊 Clogged capillary tube (refrigerant does not circulate).

⚠️ Attention: Do not try to repair the refrigerator yourself if it is under warranty. Incorrect actions (for example, opening the cooling system) will result in loss of warranty service. Contact the service center with a description of the problem.

What to do if the compressor turns off too quickly?

The opposite situation - the compressor turns on for 1-2 minutes and immediately turns off. This is also abnormal and may indicate:

• 🔌 Power supply problems (low voltage, unstable network).
• 🌡️ Thermostat malfunctions (false signals about reaching temperature).
• 🔧 Failure of the compressor (cannot dial pressure).
• 💡 Failure in the control board (especially important for models with electronic control, for example, Liebherr CNef 4815).

For diagnostics:

1. Check the voltage in the socket with a multimeter (should be 220-230 V).
2. Turn off the refrigerator for 10-15 minutes, then turn it on again. Sometimes this resets the board errors.
3. Listen to the compressor: if it hums but does not start, the winding may have burned out.

If the problem repeats, call a technician. Quick shutdown of the compressor leads to its overheating and shortens its service life.

The influence of external factors on operation. compressor

Even a working refrigerator can behave unusually due to external conditions. Let's consider the key factors:

• 🌡️ Room temperature. At +30°C and above, the compressor works 30–50% longer. Some models (for example, Atlant MXM 2835-90) may not withstand the heat and require moving to a cool place. place.
• ☀️ Direct sun. rays. If the refrigerator is located near a window, its body heats up, which increases the load on the system.
• 🔌 Power supply quality. Power surges can cause false protection activations. Connect the refrigerator through a stabilizer (especially important for rural areas).
• 🚪 Frequency of door opening. Each time you open the chamber, warm air enters. If the door is opened frequently (for example, in a large family), the compressor will work almost. constantly.

In some cases, the problem is solved by simple steps:

How to reduce the load on the compressor?

1. Install the refrigerator away from the stove, radiator or window.

2. Do not put hot foods in it - let them cool to room temperature.

3. Check if the outlet is overloaded (do not connect the refrigerator and microwave to the same extension cord).

4. Defrost the freezer regularly (if the model is not No Frost).

5. Set the thermostat to the optimal mode: for the main chamber +4...+5°C, for the freezer -18°C (not lower if deep freezing is not needed).

When is it worth calling a technician?

Not all problems with the compressor require professional repair. But there are situations when you can’t do it without a technician. get by:

• 🔊 The compressor hums, but does not start. There may be problems with the starting relay or motor winding.
• ❄️ The refrigerator does not cool, but the compressor is working. A sign of a freon leak or a blockage in the system.
• 🔥 The compressor housing is scalding hot. Normal temperature is up to +60°C, if higher, overheating is possible.
• 💥 The protection is triggered (knocks out the plugs). Short circuit or inter-turn short circuit in the winding.
• ⏳ The compressor runs for more than 24 hours without stopping. Even for inverter models this is not normal.

The cost of repairs depends on the problem:

• Replacing the thermostat: 1,500–3,000 ₽.
• Repair of the starting relay: 1,000–2,500 ₽.
• Refilling with freon: 3,000–6,000 ₽ (including leak diagnostics).
• Replacement of the compressor: 5,000–12,000 ₽ (depending on the model).

⚠️ Attention: If the refrigerator is under warranty, do not agree to repairs from unofficial services. This will void the manufacturer’s warranty. Contact only authorized centers (their list is usually in the device passport).

FAQ: Frequently asked questions about compressor operation

How long should the refrigerator compressor run when first turned on?

For a new or defrosted refrigerator, the norm is from 2 to 8 hours of continuous operation (for inverter models up to 12-24 hours). It all depends on the type of compressor, room temperature and load). chambers. If after 12 hours the compressor does not turn off, check the seals, the temperature in the room and the loading of products.

Why does the compressor work without stopping for a day?

Possible reasons:

1. Mode activated Super Freeze or Fast Cool.
2. High room temperature (+30°C and above).
3. Malfunction of the thermostat or temperature sensor.
4. Freon leak (the compressor cannot reach the desired temperature).
5. Wear door seals (warm air enters).

If the modes are disabled and the problem remains, call a technician.

Is it normal for the compressor to turn off for 1-2 minutes and turn on again?

No, this behavior is abnormal. about:

• Thermostat malfunctions (false signals).
• Problems with the starting relay (the compressor cannot hold pressure).
• Low voltage in the network (the compressor is not receiving enough power).

Check the voltage in the outlet and contact service.

How often should the compressor turn on in normal mode?

For linear compressors normal cycle: 20–30 minutes of operation, 10–20 minutes of rest. Inverter work almost constantly, but with reduced power The frequency of switching on depends. from:

• Room temperatures.
• Amount of products in the chamber.
• Quality of seals.
• A specified cooling mode.

Is it possible to repair the compressor yourself?

No, if you do not have experience and tools. A compressor is a sealed system with refrigerant under pressure. Incorrect repair can lead to:

• Freon leakage. (harmful to health).
• Compressor breakdown (if the tubes are soldered incorrectly).
• Loss of warranty.

The maximum you can do yourself is to check the seals, voltage in the socket and ventilation of the rear grille.