After delivery of new household appliances to the kitchen and its After unpacking, owners often encounter a situation where the unit begins to hum and does not stop for hours. This raises a well-founded concern: is the device working properly, or has a critical malfunction occurred in the system that requires returning the product to the store? Understanding the physical processes occurring inside the chamber during the first hours of operation allows you to avoid unnecessary panic and unfounded calls to service centers.
The answer to the question of how long the refrigerator operates when first turned on is not a definite number, since it depends on many factors, including the temperature in the room, the volume of the fridge compartment and the type of refrigerant used. However, there are average technical standards that engineers rely on when designing compressor units. In most cases, continuous operation for 6–8 hours is considered normal until the set temperature parameters are reached.
It is important to understand that the initial start-up is a process of deep freezing of the empty volume, which requires maximum output from the engine. Thermal insulation the walls have not yet “got cold”, and the thermostat does not give the command to shutdown until the internal environment cools down to minimum values. If your device works longer than usual, but it is already cold inside, this may indicate a violation of the rules of initial operation.
The duration of this period also directly depends on how long the equipment was in a horizontal position during transportation. The oil could flow into the cooling circuit, and the system requires time not only to freeze, but also to stabilize the pressure and return the lubricant to the crankcase compressor. Ignoring the settling time often leads to the unit running “idle” or with increased noise.
Factors influencing the duration of the first cooling cycle
The first thing to consider is ambient temperature. If you install the refrigerator in a hot room or in the summer, when the kitchen is +30°C, the operating time before the first shutdown will increase significantly. The motor requires more effort to remove heat from the condenser and cool the internal volume. In such conditions, even a 10-hour cycle without a break is considered normal.
The second important aspect is the design features of the model. Modern units with a No Frost or Full No Frost system have a more complex air circulation system and additional fans. They take time to cool not only the food (or the walls of the chambers), but also the entire air duct and the evaporator hidden behind plastic panels. This is a natural process inherent in the operating algorithm of the electronics.
⚠️ Attention: If after 12-14 hours of continuous operation the temperature inside the chambers remains at room temperature, and the back wall or side panels do not heat up (or do not cool, depending on the model), this is a direct sign of a freon leak or a compressor malfunction.
It’s also worth remembering about the workload. An empty refrigerator cools down faster than a completely filled refrigerator, but when you turn it on for the first time, it usually does not load. But if you decide to immediately fill the chambers with warm products, the operating time can extend for a day, which is an extreme load on the equipment.
Norms of operating time for different types of refrigerators
There is a difference in the initial start-up time between different generations and types of equipment. Older models with one compressor and a drip defrosting system often reach the operating mode faster, since their design is simpler. Modern inverter models may run longer at first, but do so more smoothly and with less power consumption.
Inverter motors do not turn off completely, but only reduce speed. Therefore, when turned on for the first time, they may not “click” the relay, creating the illusion of endless operation. In fact, they simply maintain low power, gradually raising the temperature to normal. This is the normal operating mode, which should not cause concern to the owner.
Below is a table of the approximate operating time before the first automatic shutdown (or switching to temperature maintenance mode) for various types of equipment:
| Refrigerator type | Approximate operating time | Features behavior |
|---|---|---|
| Single-compressor (drip) | 4 - 6 hours | Loud periodic shutdown, fast cooling |
| Two-compressor (No Frost) | 6 - 10 hours | Compressors can work in turn or together |
| Inverter (single- or double-circuit) | 8 - 12 hours | Works almost silently, does not turn off completely |
| American (Side-by-Side) | 10 – 14 hours | The large volume of the chambers requires long-term cooling |
It is important to note that the indicated time intervals are relevant provided that the refrigerator was correctly installed and the required rest period was maintained after transportation. Violation of these conditions can change the time of the first cycle in any direction.
Rules of preparation before the first launch
In order for the first launch to be successful and not lead to breakdown of expensive equipment, the sequence of actions must be strictly followed. Errors at the preparation stage often become the reason why refrigeration unit works incorrectly or fails in the very first days of operation.
The first step is to remove all shipping materials. This applies not only to the external packaging, but also to the internal fasteners of shelves, drawers and adhesive tape that secures the doors. Some models have special transport bolts or wedges that block the movement of boxes, which must be removed.
☑️ Preparation for first use
The critically important step is to keep the equipment in an upright position. If the refrigerator was carried in the back of a gazelle, even a short tilt could dislodge the oil. For summer transportation, 2-3 hours are enough, in winter - at least 4-6 hours, and it is better to leave the equipment for a day in a warm room before turning it on.
After the equipment has settled, it is necessary to wipe the internal surfaces with a weak soda solution or a special plastic care product. This will remove the smell of new plastic and production dust. Then the doors should be left open for 1-2 hours for ventilation.
⚠️ Attention: Do not plug in the refrigerator if it has just been brought in from the cold. A sharp temperature change can lead to the formation of condensation on electrical contacts and damage to the wire insulation.
Typical errors during operation on the first day
The most common mistake is trying to load the refrigerator with food immediately after turning it on. This is strictly forbidden. The chambers must cool to operating temperature when empty. Loading with warm products will force the compressor to work hard, trying to cool a large volume of heat, which can lead to its overheating and protection activation.
The second mistake is setting the thermostat to the maximum cooling mode (Max Cool or Super Freeze) immediately at start. Although this seems logical, the electronics themselves will determine the optimal operating algorithm. Forced installation of extreme modes unnecessarily can disrupt the calibration of sensors.
The third mistake is ignoring the installation level. If the refrigerator is placed on an uneven floor, the doors may not fit tightly, or the compressor will vibrate more. This leads to the fact that warm air constantly gets inside, and thermostat does not give a command to stop the engine, considering that the temperature has not yet reached normal.
What to do if the refrigerator hums loudly when first started?
A loud hum during the first hours of operation is often caused by the fact that the refrigerant is actively circulating through the empty tubes, and the oil has not yet been distributed evenly throughout the system. If the humming noise is accompanied by strong vibration, check the installation level and leveling feet. If the noise does not subside after a day, contact the service.
Also, users often forget to check the tightness of the sealing rubber bands. When installing for the first time, you should wipe them and check for any creases. A loosely closed door is a guarantee that the refrigerator will work without interruption.
Diagnostics: when it’s time to sound the alarm
Understanding the line between normal and breakdown is a key skill for the owner of new equipment. If the refrigerator has been running for more than 14-16 hours, and it is still warm inside, this is a clear signal of a malfunction. In such a situation, further operation is useless and dangerous.
Pay attention to the temperature of the outer walls. On most models, the side panels or rear grille should be warm or even hot, as they radiate heat into the room. If the unit hums, consumes electricity, but the walls remain cold and the inside does not get cold, most likely there is a freon leak.
Another alarming symptom is cyclical operation at very short intervals. For example, the compressor is turned on for 2 minutes, then turned off for 30 seconds, and so on in a circle. This may indicate problems with the starting relay or a blockage in the capillary tube of the system.
Recommendations for further operation
After the refrigerator has successfully completed the first cooling cycle and switched off (or switched to temperature maintenance mode), you can begin to gradually load it. It is better to do this in small portions, giving the equipment time to cope with the heat introduced by the products.
Do not place hot or warm foods in the chamber. This will not only increase the operating time of the compressor, but may also negatively affect neighboring products, disrupting the storage temperature conditions. All products should be at room temperature or refrigerated.
Check the operation of the unit regularly in the first weeks. If you notice that the operating time has increased, condensation or ice has appeared where it should not be, this is a reason for a more detailed analysis of the settings or calling a specialist.
⚠️ Attention: Manufacturers can make changes to the software and design of the equipment. If the behavior of your device differs greatly from what is described in the instructions, check the official user manual for your specific model.
Frequently asked questions (FAQ)
Is it possible to plug in the refrigerator immediately after delivery if it was not placed vertically?
Strongly not recommended. When transported in a horizontal position, oil from the compressor flows into the cooling circuit. If you turn on the unit immediately, the compressor will operate without lubrication, which will lead to rapid wear or jamming. It is necessary to wait at least 4-6 hours (preferably a day) in a vertical position.
Why has the refrigerator not turned off for 10 hours, although it is cold inside?
This may be the norm for the first time it is turned on, especially in a hot room or for No Frost models. However, if the temperature inside has already reached a minimum, check that the doors are closed tightly and that there are no drafts. Also make sure that the thermostat is not turned up to maximum.
Do you need to wash the refrigerator before turning it on for the first time?
Yes, definitely. Industrial dust and the smell of plastic and packaging may remain inside the chambers. Wipe all surfaces with a soft cloth soaked in a weak solution of baking soda or warm water and soap, then wipe dry and ventilate.
How long should you not open the refrigerator after turning it on for the first time?
After turning it on, it is not recommended to open the doors during the entire first cooling cycle (usually 6-8 hours). Each time you open the door, you let in warm, moist air, which resets the cooling progress and makes the compressor work longer.