You have just installed a new refrigerator, turned it on, and it has been working non-stop for several hours. Is this normal? How long should the unit operate before the first automatic shutdown, and when should you start worrying? These questions concern most owners of new equipment, especially if we are talking about expensive models with a system No Frost or an inverter compressor.
In this article we will look at why a new refrigerator may not turn off for a long time, what factors influence the duration of the first operating cycle, and in what cases continuous operation signals a malfunction. You will also learn how to properly start the refrigerator for the first time in order to avoid common mistakes, and what to do if the equipment behaves “suspiciously” even after a day of continuous operation. Spoiler: for most modern models (
Spoiler: for most modern models (Samsung, LG, Atlant, Indesit), continuous operation for 4–8 hours when first turned on is the norm. But there are nuances that manufacturers often keep silent about in the instructions.
Why a new refrigerator does not turn off for a long time: 5 main reasons
The first turn on of the refrigerator is always a stress test for the equipment. The compressor operates at full power to cool the interior to the set temperatures, while the control system calibrates the sensors. This is why the unit may not turn off longer than you expect:
- 🔥 Initial cooling. In an empty refrigerator, the air temperature is equal to room temperature (usually
20–25°C). To lower it to+4…+6°Cin the main chamber and-18°Cin the freezer, the compressor takes time - from 2 to 6 hours depending on the volume. - ❄️ Cooling system type. Models with drip defrosting (for example, Indesit DF 4180) turn off faster than refrigerators with No Frost (Samsung RB30A3200SA, where fans distribute the cold throughout all compartments.
- 🌡️ Room temperature. If the kitchen is hot (
+30°Cand above), the compressor will have to work longer. The same applies to cases when the refrigerator is located next to a stove or radiator. - 📦 Loading with food. If you immediately fill the refrigerator with warm products (for example, after shopping in a supermarket), the time of the first cycle will increase by 30–50%.
- ⚙️ Compressor type. Inverter models (LG GA-B489YVQZ) start smoothly and can work up to 12 hours in a row, while linear compressors are turned off more often, but with a higher load.
The case when the refrigerator does not turn off is considered critical more than 24 hours when the chamber is empty and at room temperature +20…+25°C. This may indicate thermostat malfunction, freon leak or failure in the electronic control unit.
How long a refrigerator should work before the first shutdown: standards by type
Manufacturers rarely indicate the exact time frame for the first cycle, but there is average data based on tests of popular models. Below is a table with approximate standards for different types of refrigerators:
| Refrigerator type | Volume (l) | Time until first shutdown (hours) | Notes |
|---|---|---|---|
| Single chamber (drip system) | 100–150 | 2–4 | Cools quickly due to small volume |
| Two-chamber (No Frost) | 250–350 | 4–8 | Fans accelerate the distribution of cold, but increase the load on the compressor |
| Side-by-Side (Full No Frost) | 400–600 | 6–12 | Large volume requires long-term cooling, especially during the first loading |
| Inverter compressor | Any | Up to 24 | Operates continuously at reduced power, outages may be short-term |
Please note: if you turned on the refrigerator in the “Super Freeze” mode (Super Freeze), it may not turn off until 48 hours —this is normal. This mode is used to quickly freeze large quantities of food and can be turned off manually.
⚠️ Attention: If your refrigerator is equipped with a display, check the current temperature in the chambers. If after 12 hours of operation in the main chamber it is still+15°Cor higher, and the freezer has not reached-10°C, this is a reason to call a technician.
What to do if the refrigerator works for a day and does not turn off
If more than 24 hours have passed and the compressor is still humming without a break, follow these steps:
Check that the door is closed (even a small gap will interfere with cooling)
Make sure that the thermostat is not set to maximum (+2°C in the refrigerator in the chamber - this is the norm -30°C - no)
Turn off the “Super Freeze” or “Quick Cooling” mode if it is activated
Check whether the freezer is overloaded with warm foods
Measure the temperature indoors (at +30°C and above the refrigerator may not be able to cope)
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If after these manipulations the compressor still does not turn off, the reasons may be more serious:
- 🔧 Thermostat malfunction. The temperature sensor may give incorrect readings, causing the compressor to run without stopping. In models Atlant i Beko this is a common problem.
- ❄️ Refrigerant leak. If there is not enough freon, the refrigerator cannot reach the desired temperature. Symptom: the condenser (grid at the back) remains cold.
- 🔌 Failure of the control board. In modern refrigerators (Samsung, LG), the electronic unit may “freeze” in continuous cooling mode.
In these cases, self-repair is not recommended - contact a service center. The warranty case usually covers such malfunctions if the refrigerator was operated according to the instructions.
How to turn on the refrigerator correctly for the first time: step-by-step instructions
Many problems with continuous operation arise due to incorrect first start-up. Follow this algorithm to avoid common mistakes:
Let the refrigerator stand after delivery. If the equipment was transported lying down, oil from the compressor could get into the circuit. Wait
4-6 hoursbefore turning it on so that it cools down.Set the correct temperature. Optimal settings for the first start:
- Refrigerator:
+4…+5°C - Freezer:
-18°C
- Refrigerator:
Avoid extreme values (+2°C or -24°C) - they increase the load on the compressor.
Do not load the products immediately. Allow the refrigerator to reach its empty temperature at least 2-3 hours. Then fill the chambers gradually, in small batches.
Check the ventilation. Make sure that there is a gap of at least 5 cmbetween the back of the refrigerator and the wall, and that the condenser grille is not covered by furniture.
If you bought a refrigerator with the function "Vacation" (Holiday Mode, disable it before the first start. In this mode, the temperature in the refrigerator compartment is maintained at +12…+15°C, which can be confusing during diagnostics.
What happens if you turn on the refrigerator immediately after transportation?
If you ignore the rule of waiting after delivery, the oil from the compressor may clog the capillary tube. This will lead to overheating of the motor and its premature wear. In the worst case, the compressor will burn out after a few months of operation, and the warranty does not cover such a case.
When is long operation of the refrigerator the norm?
Continuous operation of the compressor does not always indicate a breakdown. There are situations where this is expected behavior:
- 🌞 Hot weather. If the room temperature exceeds
+30°C, the refrigerator can work without stopping for up to12–16 hours, especially if it is in the sun or next to the stove. - ❄️ Super Freeze mode. In models Liebherr or Siemens this mode can last up to
72 hoursif it is not turned off manually. - 📦 Loading a large amount of warm food. For example, if you put fresh meat in the freezer at a temperature of
10 kgfresh meat temperature+20°C, the compressor will need up to10 hoursto freeze it up to-18°C. - ⚡ Voltage surges. If the network voltage is unstable (
180–240 V), the electronic unit may go astray, causing the compressor to work longer.
To distinguish normal from breakdown, pay attention to temperature in the chambers. If after 12 hours in the refrigerator compartment +5°C and below, and in the freezer -15°C, everything is in order. If the temperatures are far from the target, and the compressor does not turn off, this is a cause for concern.
Common mistakes when turning on the refrigerator for the first time
Even experienced users sometimes make mistakes that lead to improper operation of the equipment. Here are the most common of them:
- 🚫 Ignoring instructions. Manufacturers (Atlant, Indesit) often indicate in the manual the features of the first launch, but few people read this section.
- 🔌 Connection via an extension cord. The refrigerator must be plugged directly into an outlet. Extension cords and tees can cause voltage sags, due to which the compressor does not operate correctly.
- 🧊 Filling the freezer with ice before cooling. If you put ice or frozen food in a freezer that is still warm, this will put additional stress on the system.
- 🌡️ Incorrect temperature setting. Setting
-24°Cin the freezer and+2°Cin the refrigerator will cause the compressor to wear out.
Another typical mistake - opening the door frequently in the first hours work. Every time you check to see if the cold has set, warm air gets in and the compressor has to start all over again.
⚠️ Attention: If you bought a refrigerator with air exchange system (for example Samsung Twin Cooling Plus), do not block the vents products. This disrupts air circulation and leads to overheating.
FAQ: Answers to frequently asked questions about turning on the refrigerator for the first time
My refrigerator has been running for 10 hours without stopping. Is this normal?
For most modern models - yes. Especially if it is a refrigerator with No Frost or an inverter compressor. The main thing is that after 10 hours the temperature in the chambers approaches the set one. If the freezer is already -15°C, and the refrigerator is +6°C, you don’t need to worry.
What to do if the refrigerator does not turn off and does not cool?
This is a sign of a serious malfunction. Possible reasons:
- Freon leak (refill required).
- Compressor breakdown (needs repair or replacement).
- Control board failure (flashing or replacement).
Immediately unplug the refrigerator and call a specialist. Further operation can lead to complete failure of the equipment.
How long should a refrigerator with an inverter compressor operate?
Inverter models (LG, Samsung, Hitachi) can operate up to 24 hours without a complete shutdown. Their compressors do not turn off completely, but go into reduced power mode. If you do not hear a loud hum, and the temperature in the chambers corresponds to the settings, everything is in order.
Do you need to defrost a new refrigerator before turning it on for the first time?
No, this is not only useless, but also harmful. Modern refrigerators come from the factory in sealed packaging, and there is no moisture inside that needs to be removed. Defrosting a new unit can lead to corrosion of parts or damage to seals.
Why does a new refrigerator make a loud noise in the first hours of operation?
In the first 1–2 days the compressor may be louder than usual. This is due to:
- Beating in new parts.
- Oil circulation in the system.
- Operation of fans in models with No Frost.
If the noise does not decrease after 48 hours, check whether the refrigerator is level (adjustable by legs) and whether it is touching the back wall of the furniture.