The first time you turn on the refrigerator: how long should the compressor work and when is this the norm, and when - cause for concern

You bought a new refrigerator, brought it home, installed it in the kitchen - and now the moment has come to turn it on for the first time. The compressor starts to hum, but how do you know how long it should run continuously? Two hours? Half a day? Or even a day without stopping? The answer to this question depends on many factors: the model of the refrigerator, the room temperature, the volume of the chambers, and even whether it is loaded with food. In this article we will understand what duration of operation of the compressor when first turned on is considered normaland in what cases it is worth being wary and checking the equipment for malfunctions.

Many users confuse first switching on s super freezing mode or emergency failure. For example, if the refrigerator runs for 12 hours straight, this is not always a sign of a breakdown - sometimes it should be so. But how to distinguish a normal situation from a malfunction? We analyzed data from leading manufacturers (Atlant, Samsung, LG, Indesit, Beko) and interviewed service engineers to provide clear guidelines. You will also learn how to speed up the refrigerator's operation mode and what to do if the compressor does not turn off for too long.

Spoiler: in 90% of cases, prolonged operation of the compressor upon first start-up is the norm. But there are 3 key signs that signal possible problems. About them - in the section about fault diagnosis.

Why the compressor runs for a long time when first turned on: the physics of the process

When first started, the refrigerator faces a task that is radically different from normal operation. The temperature inside the chambers is room temperature (about +20...+25°C), and the task is to cool the air to +4...+5°C in the refrigerator compartment and to −18°C in the freezer. To do this, the compressor needs:

• 🔹 Overcome thermal inertia —metal walls, shelves and plastic parts are also heated and give off heat.
• 🔹 Create a cold reserve —an ice layer should form on the evaporator in the freezer (in models with No Frost this is hidden from view).
• 🔹 Stabilize the freon pressure —in the new system, the refrigerant is distributed unevenly, and the compressor needs time to “pump.”

In technical documentation Samsung i LG indicates that when first turned on, the refrigerator can work without stopping for up to 24 hours - this is not considered a malfunction if the temperature in the chambers drops. However, in practice, most modern models cope with the task in 2–8 hours. It all depends on:

• 🌡️ Room temperatures - if the kitchen is +30°C, the compressor will have to work longer.
• 📦 Chamber volume — Side-by-Side at 600 liters takes longer to cool than a single-chamber one Atlant 200 liters.
• ❄️ Availability of products —an empty refrigerator will cool faster than one loaded with warm products.
• ⚙️ Type of cooling system — No Frost can work longer due to forced air circulation.

Interesting fact: in refrigerators with inverter compressors (for example, Hitachi or Panasonic) the first cycle can take 20–30% less time than models with conventional motors. This is due to smooth power control.

Norms for compressor operating time when first turned on: table by type of refrigerator

In order not to guess how long your refrigerator should work without stopping, we have compiled a table based on data from manufacturers and service centers. Please note: the values are approximate and may vary depending on external conditions.

If your refrigerator falls within these limits, there is no need to worry. For example, Samsung RB37A5200 (367 l, No Frostat room temperature +23°C on average it works for 5-7 hours before the first shutdown). data-i="115">(single-chamber, 170 l) will handle it in 1.5–2 hours. Atlant MXM 1708 (single-chamber, 170 l) will handle it in 1.5–2 hours.

⚠️ Attention: If the compressor operates for more than 24 hours, and the temperature in the chambers does not drop to the set temperature (check with a thermometer!), this is a reason to call a technician. Possible reasons: leak. freon, thermostat malfunction or clogged capillary tube.

How to properly check the operation of the refrigerator when you turn it on for the first time

Many users make the same mistake: they turn on the refrigerator, hear the hum of the compressor and begin to panic after 2-3 hours, thinking that “something is going wrong.” Actually do not touch the equipment for the first 6-8 hours give it the opportunity to stabilize. But if you want to control the process, here is a checklist of the right actions:

For accurate diagnosis you will need:

• 🌡️ Thermometer for the refrigerator (you can use a regular street one with a sensor on the wire).
• ⏱️ Stopwatch or timer on your phone to record the operating time of the compressor.
• 📝 Notepad to record readings (if you want to track the dynamics).

Test algorithm:

1. Turn on refrigerator is connected to the network, set the thermostat to the middle position (usually this is 3-4 divisions or −18°C for the freezer).
2. Place the thermometer in the refrigerator compartment (on the middle shelf) and in the freezer (if there is a second thermometer).
3. Close the doors and do not open them for at least 2 hours.
4. After 2 hours, check the temperature in the refrigerator compartment, it should begin to drop (albeit slowly).
5. If after 6 hours in the refrigerator compartment it is still +15°C, and the compressor does not turn off - this is a cause for concern.

What speeds up the refrigerator's return to operating mode (and what slows it down)

If you want the refrigerator to return to normal mode faster, here are some proven methods:

• 🧊 Do not load food immediately —let the refrigerator cool empty for at least 2-3 hours. Warm foods (especially liquids) increase cooling time by 30–40%.
• 🔌 Connect the refrigerator to a separate outlet —voltage surges can disrupt the compressor, forcing it to restart.
• 🌬️ Provide ventilation —between there should be at least 5 cm of space between the back wall of the refrigerator and the kitchen wall.
• ☀️ Avoid direct sunlight - if the refrigerator is located near the window, close the curtains on the first day.

And now - what slows down cooling:

• 🚪 Frequent opening of the door —every time you look inside, the temperature rises by 2–3°C.
• 🥘 Hot foods —soups, pots with freshly cooked food or boiling water in bottles.
• 🧊 Thick layer of ice in the freezer (relevant for models with manual defrosting) - if you turned on a used refrigerator, defrost it first.
• 🔌 Low voltage in the network - the compressor is running less effective.

For example, if you put a pot of hot borscht in a new Indesit DF 4180 pan, the time of the first cycle may increase from 5 to 8–10 hours. And if you also open the door frequently, the compressor will work for almost a day.

The myth about “breaking in” the refrigerator

There is no evidence that the refrigerator needs to be “run in” (like a car). Manufacturers (Bosh, Electrolux) officially declare: the equipment is ready for full operation immediately after the first cooling cycle. However, in the first 2-3 days it is better to avoid extreme loads (for example, do not freeze 10 kg of meat at a time).

When to sound the alarm: 5 signs of malfunction when first turned on

In most cases, long-term operation of the compressor is the norm. But there are 5 signals that indicate possible problems:

1. The compressor has been running for more than 24 hours, and the temperature in the chambers does not drop below +10°C.
   

   Possible reasons: freon leak, thermostat or compressor malfunction.

2. The compressor turns off at 5-10 minutes, then turns on again, but the temperature does not drop.
   

   This is a sign false operation of the relay or problems with the starting capacitor.

3. The body of the refrigerator gets very hot (hot at touch).
   

   Normally, the side walls may be warm, but not scalding. Overheating indicates an overload of the compressor.

4. Extraneous sounds are heard: knocking, grinding, vibration.
   

   In new refrigerators, a uniform hum may be heard for the first hours, but not mechanical shocks.

5. An error appears on the display (for example, E1, F2 or the temperature indicator is flashing).
   

   For error codes, see the instructions for the model.

If you observe at least one of these signs, you must stop using it call a technician. For example, a freon leak not only leads to breakdown, but is also dangerous to health (older models used toxic refrigerant).

⚠️ Attention: If the refrigerator was purchased in winter and delivered in an unheated transport, it must stand in a warm room for at least 4-6 hours before turning it on for the first time. Otherwise, moisture inside the system may freeze and damage the capillary tube.

Frequently asked questions about turning on the refrigerator for the first time

We have collected the most popular questions from users and provided detailed answers to them.

Is it possible to turn on the refrigerator immediately after delivery in winter?

No. If the refrigerator was transported at temperatures below +5°C, it needs to be given time to “acclimatize” in a warm room. Otherwise:

• The oil in the compressor may thicken, which will lead to increased load on the motor.
• The moist air inside the condenser will freeze, blocking the circulation of freon.

Recommended waiting time: 1 hour for every 5°C temperature difference (but not less than 4 hours). For example, if it is −10°C outside and +20°C at home, wait at least 6 hours.

Why does a new refrigerator No Frost work longer than an old drip refrigerator?

In systems No Frost there is an additional heater for defrosting the evaporator, and fans that distribute the cold throughout the chamber. This increases the first cycle time by 20–30%. But then such a refrigerator turns on less often and maintains the temperature more evenly.

For comparison: Atlant XM 4021-000 (drip) will cool in 3-4 hours, and Samsung RB30A3200SA (No Frost) - in 5-7 hours under the same conditions.

Is it necessary to defrost a new one refrigerator before turning it on for the first time?

No, if this is new equipment from the factory. Defrosting is required only in two cases:

• You bought a used refrigerator, and there is ice in the freezer.
• The refrigerator was stored in an unheated warehouse, and condensation has accumulated inside.

In other cases, defrosting is not only useless, but also harmful: you will break the factory sealing of the seals.

Is it possible to put food in the refrigerator while it is running in the first cycle?

It is possible, but with reservations:

• 🥛 Refrigerator compartment: you can place food, but not warm (maximum room temperature).
• ❄️ Freezer compartment: it is better to wait until the temperature drops below −10°C, otherwise the food will thaw and freeze again, losing its taste.

Ideal option: load the refrigerator 3-4 hours after turning on, when the main cooling has already occurred.

What to do if the compressor turns off after 10 minutes and does not turn on again?

This may be the norm if:

• The refrigerator is small (up to 150 l) and empty.
• The room is cool (+16…+18°C).
• Thermostat is set to minimum cooling (1-2 divisions).

But if the refrigerator is large and the chambers are warm, check:

• Is it connected to a socket (sometimes a plug falls out unnoticeably).
• Didn't it work protective relay (try turning it off and on again after 5 minutes).
• Is the error indicator on the panel lit.

Independent diagnostics: how to understand whether the refrigerator is working

If you are confused by the operation of the compressor, you can carry out simple diagnostics without calling a technician. You will need:

• Thermometer (required!).
• Screwdriver (to check the compressor fastenings).
• Flashlight (to inspect the back wall).

Step 1: Checking the temperature

• Place the thermometer in the refrigerator compartment on the middle shelf.
• After 2 hours, check the readings If the temperature has dropped by at least 5–7°C (for example, from +20°C). to +13°C), the compressor is operating normally.
• After 6 hours, the temperature should be close to the target (+4...+5°C).

Step 2: Checking the sounds

• Normally, the compressor emits a uniform hum, sometimes with slight vibration.
• Extraneous sounds:
  • 🔊 Knock or clicks —the compressor fastenings may have become loose.
  • 🔊 Whistling or hissing —freon leak or clogged capillary tube.
  • 🔊 Loud buzzing with pauses — faulty start relay.

Step 3: External inspection

• Check if the refrigerator body is hot (especially at the back, near the compressor).
• Make sure that the ventilation grille (if any) is not clogged with dust.
• Shine a flashlight on the back wall - there should be no oil stains (a sign of a leak from the compressor).

If all checks have been passed, but doubts remain, use the service codes (for models with a display). For example, in refrigerators Samsung to enter the diagnostic mode, you need to press Power Cool + Fridge (simultaneously) for 5 seconds. LG — Door Alarm + Ice Plus.

⚠️ Attention: If the refrigerator is under warranty, do not disassemble it yourself! This will void the warranty. Contact the service center with a description of the problem.

Conclusions: what to remember about the first time you turn on the refrigerator

Let's summarize:

1. Normal the duration of operation of the compressor when you first turn it on - from 2 to 12 hours (depending on the model and conditions).
2. The main criterion for serviceability is temperature reduction in the chambers. If it drops, even slowly, everything is in order.
3. Alarming signs: the compressor is working. >24 hours without results, the case overheats, extraneous sounds are heard.
4. How to speed up the process: do not load warm products, provide ventilation, do not open the door unless necessary.
5. What not to do: do not turn on the refrigerator immediately after winter delivery, do not defrost a new refrigerator for no reason, do not ignore errors on the display.

If your refrigerator falls within the described standards, feel free to continue using it. In 95% of cases, prolonged operation of the compressor upon first start-up is not a breakdown, but normal operation. But if something goes wrong, now you know what to look for and when to contact a specialist.