Have you bought a new refrigerator, connected it to the network, but it has been running non-stop for several hours? Or, on the contrary, did it turn off too quickly and you doubt that everything is okay? The time of the first cycle of operation is one of the key indicators by which you can evaluate the serviceability of equipment even before loading products. However the standards for different models and types of refrigerators are very different.and manufacturers rarely indicate them in the instructions.
In this article we will look at how long the refrigerator should work when first turned on depending on the type of compressor, the volume of the chambers and external conditions. Let us explain why modern inverter models can not be turned off for days, while old “drip” ones can start up every 10 minutes. You will also learn how to distinguish normal mode from breakdown and what to do if the cycle is clearly broken.
Why the refrigerator does not turn off after the first start: the physics of the process
When turned on for the first time, the refrigerator runs longer than usual for one simple reason: it cools not only the interior space, but also all its parts - from the evaporator to the thermal insulation of the walls. In technical documentation this stage is called "initial entry to the mode". Its duration depends on:
- 🔹 Compressor type: inverter models (LG, Samsung, Bosch) can operate continuously for up to 24 hours, conventional linear ones - 2–8 hours.
- 🔹 Chamber volume: Side-by-Side of 500 l will cool longer than a single-chamber Atlant 120 l.
- 🔹 Room temperatures: if the kitchen is +30°C, the first cycle time will increase by 30–50%.
- 🔹 Refrigerant refills: new models use R600a (isobutane), which requires longer pumping of the system.
It is important to understand what the compressor will not turn off until the sensors record the set temperature in all zones (usually −18°C in the freezer, +4…+5°C in the refrigerator). At the same time, in modern refrigerators with No Frost or Low Frost sensors can be installed not only in the chambers, but also on the evaporator, which complicates the process.
First cycle time standards for different types of refrigerators
Manufacturers rarely indicate exact numbers in the instructions, but there are average data based on tests of popular models. Below is a table with approximate values for different types of refrigerators at room temperature (+20...+25°C):
| Refrigerator type | Volume (l) | Time until first shutdown | Notes |
|---|---|---|---|
| Single-chamber (linear compressor) | 100–150 | 1–3 hours | Examples: Birusa 101, ATLANT MX 2823 |
| Two-chamber (linear compressor) | 200–300 | 3–6 hours | Popular models: Indesit DF 4180, BEKO CN 325120 |
| Two-chamber (inverter compressor) | 250–400 | 8–24 hours | May not turn off for days: Samsung RB30A3200SA, LG GA-B409SLGL |
| Side-by-Side or French Door | 400–600 | 12–36 hours | Cool the longest: Liebert GXT5, Haier A3FE742CGJ |
Critical point: if a refrigerator with a linear compressor works for more than 8 hours without stopping at a room temperature below +25°C, this is a reason to check the tightness of the seals or the refrigerant pressure. Inverter models may not turn off for up to 2-3 days - this is normal, since they maintain the temperature by smoothly changing power.
What to do if the refrigerator does not turn off longer than normal
If the time of the first cycle clearly exceeds the average values from the table above, do step-by-step diagnostics:
Make sure the door is tightly closed (check the seal)
Measure the room temperature (should not be higher than +30°C)
See whether the “Alarm” or “Super” indicator is on Freeze"
Check if the “Quick Freeze” mode is turned on
Leave the refrigerator empty for 12-24 hours (without food)
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The most common reasons for a prolonged first cycle:
- 🚪 A door that is not tightly closed or damaged seal (even a small gap increases the cooling time by 2-3 times).
- 🌡️ High room temperature (for example, if the refrigerator is standing next to the stove or in the sun).
- ❄️ The “Super Freeze” mode is activated (in some models it turns on automatically the first time startup).
- ⚙️ Temperature sensor malfunction (especially relevant for refrigerators with electronic control).
⚠️ Attention: If the refrigerator has been running for more than 24 hours, but no food has formed in the freezer ice you must call a technician to check the refrigerant. Repairing the cooling circuit yourself is dangerous - there is a risk of freon leakage or damage to the compressor.
How long should the refrigerator turn on after the first shutdown
After the refrigerator is turned on for the first time turned off, it must keep cold for 1-2 hours before the next start. This interval is called "downtime" and it depends on:
- 🔋 Thermal insulation of chambers (in models with vacuum insulation, for example Hitachi R-VG430P, downtime lasts longer).
- 📉 Delta temperature differences (the higher the temperature in the room, the more often it will turn on).
- 🧊 Availability products (an empty refrigerator heats up faster than a loaded one).
Normal values for the first cycle after shutdown:
- 🔹 Linear compressor: 30–90 minutes of inactivity, then switching on for 10–20 minutes.
- 🔹 Inverter compressor: may not turn off at all, but only reduce the speed ( a quiet hum is heard).
Why does the inverter refrigerator not turn off at all?
Inverter compressors (for example, in models Panasonic NR-BN30A1 or Toshiba GR-RS500WE) do not have sharp on/off cycles. Instead, they smoothly regulate power, maintaining the temperature without completely stopping. This is normal and even preferable - this reduces the load on the network and increases the service life of the compressor.
Signs of a malfunction: when to sound the alarm
Prolonged operation of the refrigerator when first turned on does not always indicate a breakdown, but there are obvious symptomsthat require intervention:
| Symptom | Possible cause | What to do |
|---|---|---|
| Works for >24 hours, but the freezer does not cool below −10°C | Refrigerant leak or clogged capillary tube | Call a technician to diagnose the circuit |
| The compressor turns off for 5-10 seconds and turns on again | Malfunction of the starting relay or thermostat | Check the relay with a multimeter or replace it |
| Clicks are heard, but the compressor does not start | Interturn short circuit in the winding or burnt out condenser | Replacing a compressor or condenser |
| A thick layer of ice forms on the back wall | Clogged drainage system or defrost malfunction No Frost | Clean the drainage or replace the defrost heating element |
If the refrigerator turned off too quickly (for example, after 20–30 minutes), this is also abnormal. Probable reasons:
- 🔌 Thermal protection of the compressor was triggered (overheating due to high voltage in the network).
- 📱 The electronic control unit is faulty (a common problem with Samsung RL38* or LG GB-*).
- 🌡️ The temperature sensor is “lying” and shows false values.
⚠️ Attention: If the refrigerator turned off 5-10 minutes after starting and does not turn on again, do not try to start it again within an hour - this can lead to burnout of the compressor winding. Let the equipment cool down and check the voltage in the outlet (should be 220-230 V).
How to speed up the refrigerator's operation. mode
If you need to load food faster, you can optimize the conditions for the first start:
Install the refrigerator in the coolest place in the kitchen (away from the stove and window)
Disable the “Super Freeze” mode (if it is enabled by default)
Do not load products in the first 6-12 hours
Use a fan to blow the back wall (improves heat transfer)
Check if anything is blocking the air circulation inside the chambers
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Also will help correct temperature setting when you turn it on for the first time:
- 🥶 For the freezer, set
−16…−18°C(not lower, otherwise the compressor will work longer). - 🥦 For the refrigerator camera:
+4…+5°C(in most models this is the middle position of the regulator).
In refrigerators with electronic control (for example, Bosch KGE39AW25R or Electrolux ENN2854AOW) you can activate the mode «Holiday» or «Eco» for the first day - this will reduce the load on the compressor.
Common mistakes when turning on the refrigerator for the first time
Many users themselves extend the time the refrigerator comes into operation by making typical errors:
- 🚫 Loading warm products in the first hours of operation (every kilogram of warm products increases the cooling time by 10-15 minutes).
- 🚫 Installation refrigerator close to the wall (there must be a gap of at least 5 cm for air circulation).
- 🚫 Connection via an extension cord (can cause a voltage drop and false protection triggers).
- 🚫 Frequent opening doors in the first hours (each time the compressor has to raise the temperature again).
Another common problem is improper transportation. If the refrigerator was transported lying on its side (and not vertically), oil from the compressor could get into the circuit. building. the first switching on must be delayed for 6-12 hoursso that the oil flows back. Otherwise, the compressor will run dry and quickly fail.
FAQ: Answers to frequently asked questions
My refrigerator has been running for 12 hours without stopping. Is this normal?
For inverter models (LG, Samsung, Panasonic) - yes, this is normal for refrigerators with a linear compressor (ATLANT, Indesit, BEKO) at room temperature +20…+25°C, the maximum time of the first cycle is 8 hours. If more has passed, check:
- The tightness of the door.
- The room temperature (at +30°C the time increases by 30–50%).
- Not Is the “Super Freeze” mode enabled?
If everything is in order, but the refrigerator still does not turn off, call a technician to check the refrigerant pressure.
The refrigerator turned off after 30 minutes - is it a breakdown?
Most likely not, modern models (especially with an inverter. compressor) may turn off earlier if:
- The room is cool (below +20°C).
- Small volume refrigerator (up to 200 l).
- Eco or "Holiday" mode is activated.
Check the temperature in the freezer - if it is −18°C or lower, everything is fine. If it is higher than −10°C, there may be a sensor malfunction or a freon leak.
Do you need to defrost the refrigerator before turning it on for the first time?
No, this is not only useless, but also harmful. ice, and moisture on the walls after defrosting will increase the time of the first cycle. An exception is if the refrigerator was stored in an unheated warehouse in the winter and condensation has formed inside. In this case, it is enough to wipe the chambers with a dry cloth.
What happens if you immediately load food after turning it on?
The refrigerator will work longer because:
- Warm foods increase the temperature in the chamber.
- The load on the compressor increases (risk of overheating).
- The protection may work and the refrigerator will turn off ahead of time.
It is optimal to wait 6-12 hours until the equipment returns to operating mode, and only then load food in small batches.
Why does a new refrigerator hum louder than the old one?
This is normal for several reasons:
- Modern compressors (especially inverter ones) operate at higher speeds when first started.
- New models use refrigerant R600a, which requires more active pumping.
- If the refrigerator is with No Frost, you can hear the fan operating.
The hum should decrease after reaching operating mode (after 12-24 hours). If the noise does not subside, check whether the refrigerator is touching it. walls or furniture - vibration can amplify the sound.