The first turn on of the refrigerator: after how long should it turn off?

The first time you turn on a new refrigerator is a crucial moment that raises a lot of questions among users. One of the most common: "How long after starting should the compressor turn off?" The answer depends on many factors - the model of equipment, room temperature, chamber load and even the type of refrigerant. In this article, we will figure out what temporary standards are considered standard, why a refrigerator can work longer than expected, and in what cases it is worth sounding the alarm.

Many people mistakenly believe that modern refrigerators should immediately switch to energy saving mode, but in practice the first turn on is always a stress test for the system. The compressor operates at full power to cool empty (or filled with warm food) chambers to the set temperature. Continuous operation time can vary from 30 minutes to 8–10 hours —and this is not always a reason to panic. The main thing is to understand what affects the duration of the cycle and how to distinguish normal from malfunction.

How long should a refrigerator work when first turned on: standards for different types

The time of the first cooling cycle depends on refrigerator typeits volume and technological features. Let's consider the average indicators for popular categories:

• 🔹 Single-chamber refrigerators (up to 150 l): usually switched off after 1–2 hours when the chambers are empty. If loaded with products - up to 3–4 hours.
• 🔹 Two-chamber models (No Frost, drip system): the first cycle can last 4–6 hoursas the freezer is cooled longer.
• 🔹 Side-by-Side and multi-door refrigerators: due to the large volume (500 l+), the compressor can work 6–8 hours without stopping.
• 🔹 Inverter compressors (LG, Samsung, Bosch): smoothly regulate power, so the first cycle often takes 2–3 hours, but with less noticeable pauses.

Important to consider and ambient temperature. If the refrigerator is turned on in a hot room (above +25°C), the cooling time will increase by 20–30%. The same applies to cases when the equipment was delivered in winter and did not have time to adapt to room temperature before starting.

Why the refrigerator does not turn off for a long time: 5 main reasons

If the compressor runs longer than the specified standards, this does not always indicate breakdown. Here are the most common reasons for a protracted first cycle:

1. Loading warm food. If you immediately fill the refrigerator with food at room temperature (especially liquids in open containers), the compressor will take 30-50% more time to cool.
2. Incorrect installation. The refrigerator is too close to the wall (less than 5 cm), next to the radiator or in the sun - this disrupts heat exchange and makes the compressor work harder.
3. The “Super Freeze” mode is activated.. In some models (Samsung RB37J5240SA, Liebherr CNef 4315), this function is turned on automatically upon first startup.
4. New refrigerant. Modern refrigerators (for example, with R-600a or R-134a) require more time to distribute freon throughout the system.
5. Temperature sensor malfunction. If the thermostat gives incorrect readings, the compressor may run without stopping. This is already a reason for diagnosis.

Table: First cycle time for popular models

Manufacturers rarely indicate the exact time frame for the first start, but based on data from service centers and user reviews, we have compiled an indicative table:

⚠️ Attention: Data in the table are approximate. The actual time depends on the room temperature, the quality of the door seals and even the network voltage. For exact values, refer to the instructions for your model.

What to do if the refrigerator does not turn off for more than 12 hours?

If the compressor works more than 10–12 hours without pauses, this is a reason to check. Follow the algorithm:

Check that the doors are tightly closed (the seal should not be deformed)

Turn off the “Super Freeze” or “Quick Cooling” mode (if activated)

Make sure that the refrigerator is not close to a wall or furniture

Measure the temperature in the freezer (should be below -18°C after 8 hours)

Listen to the compressor: a humming sound without relay clicks may indicate a jam-->

If after these steps the compressor does not turn off, the probable reasons:

• 🔧 Refrigerant leak —requires the intervention of a technician.
• 🔧 Clogging capillary tube —diagnosed by heating the condenser in only one zone.
• 🔧 Thermostat malfunction —checked with a multimeter.
• 🔧 Control board failure —typical for models with electronic control (Samsung, LG).

How to check the thermostat yourself?

Disconnect the refrigerator from the network. Remove the thermostat protective cover (usually located inside the chamber). Connect the 2 wires going to the thermostat together (for example, with a paper clip). If the compressor starts, the thermostat is faulty and needs to be replaced. ⚠️ Be careful: work only when the power is turned off!

Myths about the first startup: what is actually harmful to the refrigerator

There are many myths around the first startup of the refrigerator that are not only useless, but also harmful. Let's look at the most common ones:

⚠️ Attention: Some “tips” from the Internet can lead to equipment breakdown. forced shutdown of the compressor manually (by pulling the plug) during the first cycle is fraught with water hammer and motor failure.

• ❌ "You need to immediately load the refrigerator with food so that it cools faster" → On the contrary, the empty chamber cools faster. Warm. products increase the load on the compressor.
• ❌ "The first day the refrigerator should work without stopping" → This is true only for industrial models. A household refrigerator should turn off after 2-8 hours.
• ❌ "The more often you open the door on the first day, the better" → Each opening adds 10–15 minutes to the cooling time.
• ❌ "Inverter compressors should not turn off" → They work smoothly, but there are still pauses between cycles (albeit shorter).

Another dangerous advice — "set the thermostat to maximum when you first turn it on". This leads to:

• 🔥 Overheating of the compressor (especially in models with R-600a).
• ❄️ Formation of excess frost in drip systems.
• ⚡ Increased energy consumption (up to +30% in the first day).

How to properly prepare the refrigerator for the first use: step-by-step instructions

To ensure the first start-up goes smoothly, follow these instructions:

1. Transportation and unpacking

   After delivery, let the refrigerator sit in a vertical position:

   • 📦 Winter —at least 12 hours (the oil in the compressor could thicken).
   • 📦 Summer —4–6 hours (enough to equalize the temperature).

   Make sure that the shipping bolts (fixing the compressor) are removed!

2. Installation

   The refrigerator should be:

   • 📏 At a distance 5–10 cm from the wall (for circulation air).
   • 🌡️ Away from direct sunlight and heat sources (stove, radiator).
   • ⚖️ By level (adjust the legs so that the door closes itself at an angle of 45°).

First power-on

Connect the refrigerator to the network and complete the settings:

• ❄️ Set the temperature: +4°C for the refrigerator compartment, -18°C for the freezer.
• ⏳ Do not load food first 2–3 hours (even if the compressor has turned off).
• 🔌 Do not connect through an extension cord - only directly into the outlet!

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

❓ The refrigerator turned off 10 minutes after turning on - is this normal?

No, this is not normal. Possible reasons:

• 🔌 The overheating protection worked (if the refrigerator did not settle after transportation).
• 🔧 Starting fault relay —the compressor could not start.
• ⚡ Power surge —check the stability of the network.

Turn off the refrigerator for 1 hour, then try again. If the problem happens again, call a technician.

❓ Why does the new refrigerator hum more than the old one?

This is normal for the first start:

• 🔊 The compressor operates at maximum power, therefore noisier.
• 💨 No Frost fans in new models they can create additional noise.
• 🛠️ Over time, the sound will become quieter (after 1-2 weeks of operation).

If the humming is accompanied by vibration or clicking, check the compressor mount and installation level.

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

❌ No! At temperatures below +5°C, the oil in the compressor thickens. If you turn on the refrigerator immediately, the risk of water hammer (compressor failure) increases 3 times. Minimum waiting time:

• 📅 When +0°C...+5°C — 12 hours.
• 📅 At -5°C...0°C — 18–24 hours.
• 📅 At -10°C and below —day.

❓ Why Has the freezer compartment cooled faster than the refrigerator compartment?

This is a design feature:

• ❄️ The freezer has separate evaporator and is cooled in priority.
• 🌡️ The fridge compartment depends on secondary flow of cold air (in models with No Frost) or capillary system.
• ⏳ The difference in cooling time can reach 2–3 hours - this is not breakdown.

If after 8 hours the refrigerator compartment is still not cooled down, check to see if the fan is blocked (in No Frost models) or if the capillary tube is clogged.

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

❌ No, this is not only useless, but also harmful:

• 💧 New refrigerators do not have ice that needs to be removed.
• 🔧 Risk of damaging seals or plastic parts during mechanical cleaning.
• ⚡ Excess moisture may get into electrical components.

It is enough to wipe the chambers with a soft cloth with a vinegar solution (1 tablespoon per 1 liter of water) to remove industrial dust.