After purchasing new household appliances or transporting them to a new place of residence, problems arise A logical question is how to properly put the unit into operation. Many users mistakenly believe that it is enough to simply plug in the cord and wait for the food to instantly cool. However first start-up this is a critical stage on which the longevity of the compressor and the efficiency of the entire system depend.
The time it takes the device for the first cooling cycle and subsequent shutdown can vary depending on many factors. This is not a fixed value, but a range determined by design features, ambient temperature and type of refrigerant. Understanding these processes will help to avoid false panic if the unit does not turn off after an hour or, on the contrary, works for too short a time.
In this article we will analyze in detail how long it should normally work compressor during the first start-up, why this period can be prolonged and what actions absolutely cannot be performed on the first day of operation. Proper preparation of equipment for operation is the key to the fact that it will last the period declared by the manufacturer without costly repairs.
Factors influencing the duration of the first cycle
The duration of operation of refrigeration equipment before the first automatic shutdown directly depends on the initial conditions inside the chambers. If you load a large number of products into a warm unit at room temperature, the cooling time will increase significantly. Thermal capacity products and air inside the chambers require time to be removed, so you should not expect quick results with a full load.
The temperature in the room also plays an important role. In hot summer weather, when the room is +28°C or higher, it is more difficult for the system to remove heat through the condenser. Under such conditions, cooling cycle may last longer than standard values, and this is an absolutely normal physical process, and not a sign of a malfunction.
The design of the model determines the operating algorithm. Modern inverter models operate on the principle of maintaining temperature, so they may not turn off completely, but only reduce engine speed. Old models with a conventional compressor will work cyclically: turned on, cooled, turned off.
- 🌡️ Initial temperature: the warmer it is inside the chambers and in the room, the longer the first cycle takes.
- ❄️ System type: No Frost requires more time to cool the evaporator and fans than a drip system.
- 📦 Load volume: an empty refrigerator will cool down faster than a completely filled one with food.
Standard operating time at first start
There are average technical standards that service engineers are guided by when making diagnostics. For most household models of standard volume, the time of the first continuous operating cycle ranges from 2 to 8 hours. This range may seem broad, but it covers a variety of usage scenarios and climate conditions.
If your new unit does not turn off within 10-12 hours, there is no cause for concern, especially if the room is hot or the chamber doors are open. However, if work continues for more than a day without a break, it is worth checking the tightness of the seals and the temperature in the room. Overheating of the compressor long-term operation without stopping can lead to its breakdown.
It is important to distinguish between the operating time before the first shutdown and the time to reach the nominal temperature. The unit may turn off when the sensor records the desired values, but when the door is opened or products are loaded, the cycle will repeat. The first cycle is often the longest, since the system cools not only the air, but also plastic walls, shelves and drawers.
| Refrigerator type | Average time of the first cycle | Maximum allowable time |
|---|---|---|
| Single chamber (up to 200 l) | 2 - 4 hours | 6 hours |
| Two-chamber (No Frost) | 4 - 8 hours | 12 hours |
| Side-by-d (Side-by-Side) | 6 - 10 hours | 14 hours |
| Built-in appliances | 4 - 9 hours | 12 hours |
Why the refrigerator does not turn off for a long time
A frequent reason for a prolonged first cycle is a violation of transportation rules. If the unit was transported lying down or tilted heavily, oil from the compressor could enter the refrigerant circuit. Returning the oil to the compressor crankcase requires time, during which the device will work intensively, trying to build up pressure.
Another factor is a loose door fit. If the sealing rubber is dirty, damaged, or simply does not fit due to improper installation, warm air constantly flows inside. The temperature sensor detects an increase in degrees and does not give a command to turn off the engine. Check to see if anything is preventing it from closing tightly.
A faulty thermostat or temperature sensor can also cause it to run indefinitely. If the electronic control module receives incorrect data about the temperature inside the chamber, it will keep the compressor on. In new models, this may be signaled light indication or a sound signal.
⚠️ Attention: If the refrigerator operates without a break for more than 24 hours, be sure to unplug it and contact a service center. Long-term operation without rest cycles leads to critical wear of the compressor.
What happens to the oil during transportation?
When transported in a horizontal position, oil may leak from the compressor into the pipe system. If you turn on the unit immediately, the compressor will run dry or try to pump oil, which can lead to water hammer and valve failure. It is necessary to let the equipment stand vertically for at least 4-8 hours (preferably a day) for the oil to drain back.
Rules of preparation before the first start-up
In order for the first start to be successful and take a minimum of time, it is necessary to properly prepare the equipment. After delivery, especially if it was carried out during the cold season, you cannot immediately plug the device into the network. Sudden changes in temperature can damage electronic components and cause condensation inside wiring.
Remove all shipping locks, if present. These could be plastic staples, tape, or foam inserts between drawers. Leave the doors open for a while so that the smell of new plastic disappears and the pressure equalizes.
Wipe the internal surfaces with a damp cloth and a mild detergent. This will remove factory dust and protect products from foreign odors. Make sure that the unit is installed level, otherwise the doors may open spontaneously, disturbing the temperature conditions.
☑️ Preparation for the first start
Features of operation of No Frost and drip systems
Significant difference in the time of the first cycle is observed between models with manual defrosting (or drip system) and technology No Frost. In No Frost systems, cooling occurs due to the circulation of cold air, which is pumped by a fan. It takes more time and energy to initially cool the entire volume of air and the evaporator.
Drip systems cool the food through the back wall, which becomes frosted and then thawed. This process is more inertial, but often requires less time for the initial temperature rise, since the volume of cooled elements is smaller. However, in hot weather, the drip system can operate almost without interruption.
In models with two compressors, each compartment operates independently. This means that the freezer may turn off while the refrigerator is still running, or vice versa. In systems with one compressor and one circuit, the operating time is determined by the need of the chamber where the temperature is higher than the set one.
- 🌀 No Frost: fast distribution of cold, but longer initial cycle due to fan operation.
- 💧 Drip system: natural convection, less noise, but the risk of uneven cooling.
- ⚙️ Inverter: smooth operation, no sudden starts, energy saving.
Alarming symptoms and when you need a technician
Despite the variability in operating time, there are clear signs of a malfunction that cannot be ignored. If you hear a loud knocking, clanging or humming noise that wasn't there before, this may indicate a problem with the compressor or fan. Normal operation is accompanied by a quiet monotonous hum and occasional sounds of refrigerant flowing.
Excessive heating of the housing in the side walls or between the doors is normal for heat dissipation, but if the compressor itself (lower back) becomes hot to the point where it cannot be touched, this is a sign of overload. It is also worth paying attention to the lack of cold: if after 10 hours of operation the inside has not become colder than in the room, there is a freon leak.
Frequent switching on and off (clocking) with an interval of 1-2 minutes is also a bad symptom. This indicates a faulty start relay or thermostat. The compressor tries to start, but the protection immediately turns it off.
⚠️ Attention: Technical characteristics and operating algorithms may vary depending on the specific model and manufacturer. Always check the official instructions (operating manual) included in the kit, as they indicate the exact standards for your device.
Why are the side walls hot?
In modern refrigerators, the condenser (heat exchanger) is often built into the side walls of the case. Therefore, heating the sides to 40-60 degrees in the first hours of operation is a normal process of heat removal, and not a defect.
Frequently asked questions (FAQ)
Is it possible to load food into the refrigerator immediately after the first turn on?
It is strictly not recommended. It is better to keep the chambers empty for the first 2-4 hours of operation. This will allow the system to quickly reach operating mode without additional heat load from the products. You should load food only after the refrigerator has completed the first full cycle and turns off.
Is it true that in winter the refrigerator needs to be warmed up before turning it on?
If the refrigerator was brought from the cold, it cannot be turned on immediately. It is necessary to let it stand in a warm room for at least 4-6 hours (preferably a day) without being plugged in. This is necessary not only to drain the oil, but also to evaporate condensation that could form on the electronic boards and contacts.
How many times per hour should the refrigerator turn off in normal mode?
In normal operation (after the first start), the on and off cycle is approximately 10-20 minutes of operation and 20-40 minutes of rest. The exact frequency depends on the temperature settings, load and room temperature. Inverter models may not turn off at all, operating at low speeds.
What to do if the refrigerator does not turn off for the second day?
If more than 24 hours of continuous operation have passed, disconnect the device from the network. Check that the doors fit tightly, that there are no drafts directed at the sensors, and that they are installed correctly. If visually everything is in order, there is probably a refrigerant leak or the thermostat is faulty - you need to call a technician.