Replacement compressor is one of the most difficult and expensive procedures in repairing household appliances. After the master has completed the work, the owner naturally has a question about how long the unit should operate without stopping for the first time. Many people mistakenly believe that the new motor should immediately freeze the food and turn off, but the real physics of the process dictates its own conditions.
The initial start-up time directly depends on whether the system has been completely refrigerant charging evacuated. If the technology is followed, the refrigerator can operate continuously for 6 to 12 hours to reach the required temperature in all chambers. This period is necessary to stabilize the pressure freon and uniform cooling of the evaporator walls.
It should be taken into account that an empty refrigerator takes longer to gain temperature than a fully loaded one. Therefore, do not panic if the unit hums without interruption on the first day. It is only important to ensure that the rear wall is not unevenly covered with frost, and that the housing itself does not heat up to critical values.
Norms of continuous operation during the first start
The break-in period of a new engine is a critical moment for the entire refrigeration system. At this time, grinding in of mechanical parts and distribution of oil throughout the system occurs. The normal operating mode is one in which the refrigerator operates without stopping until the temperature inside the chambers reaches the specified parameters.
The duration of this process varies depending on the model and type of refrigerant. Modern inverter models LG or Samsung can work longer, but with less load on the network, while older linear compressors are turned on at full power. Typically, the primary cooling cycle takes from 8 to 14 hours.
If, after reaching the desired temperature (usually +4...+5°C in the main chamber and -18°C in the freezer), the equipment does not turn off, this may indicate a malfunction of the thermostat or a gas leak. However, in the first 24 hours, a small error in the operation of the automation is acceptable due to the adaptation of the electronics.
It is important to understand that defrost cycle in No Frost systems during this period can also affect the overall operating time. Fans and heaters will turn on according to a schedule, which can create the illusion of endless operation of the compressor, although in fact it periodically rests.
⚠️ Attention: If the compressor housing becomes so hot that it cannot be touched for more than 2-3 seconds, immediately disconnect the device from the network. This is a sign of overheating or improper charging of the system.
Factors influencing the duration of the first cycle
How long it will take How the refrigerator works after replacing the motor is affected by many variables. The first and main factor is the quality of the repair performed. If air or moisture gets into the system when soldering the tubes, the efficiency of heat transfer drops sharply, forcing the compressor to wear out.
The second important aspect is the volume of the chambers and the number of loaded products. A refrigerator Indesit with a large freezer volume will take longer to cool than a compact model. Ambient temperature also plays a role - the temperature in the room where the equipment is located.
- 🌡️ Room temperature: in a hot room (+30°C) the refrigerator will work almost without interruption.
- 📦 Loading with food: empty shelves cool faster, but their thermal inertia is lower.
- 🔧 Type of refrigerant: R600a (isobutane) requires a more precise dosage than R134a.
- 🧊 Condition of the seals: poor door fit increases the load on the motor.
Do not forget about the age of the remaining components of the refrigerator. If the evaporator or condenser is contaminated with dust or has microcracks, the new compressor will have to compensate for the loss of cold by constant operation. This significantly reduces the service life of a newly installed part.
Stages of checking the performance of equipment
After the technician leaves, responsibility for monitoring the condition of the equipment falls on the owner. The inspection should be carried out in stages so as not to miss important signals about possible problems. The first stage is a visual inspection and listening to the work in the first 30 minutes.
The second stage begins after 4-5 hours of work. At this time, you need to check the uniformity of cooling. In chambers with a system No Frost the cold should be distributed evenly throughout the entire volume, without warm zones at the doors.
☑️ Check after repair
The third stage is checking the shutdown cycle. If after 12-14 hours the refrigerator does not go into standby mode, it is necessary to analyze the reasons. Perhaps the temperature setting has gone wrong or the pressure in the system needs to be re-diagnosis.
⚠️ Attention: Do not load the refrigerator compartment with warm foods on the first day. This will create a critical load on the new compressor and may lead to its failure.
Comparison of operating time: before and after replacement
Users are often interested in whether the operating mode of the refrigerator will change after installing a new heart of the system. In an ideal scenario, the new compressor should work even quieter and more economically than the old one, but the adaptation period may make its own adjustments.
The old motor often worked intermittently, could not reach temperature for a long time and often turned on. The new unit will most likely operate in long cycles, but with long breaks. This is a normal and even desirable situation for the equipment resource.
| Parameter | Old compressor | New compressor (norm) |
|---|---|---|
| Cycle duration | Short starts (5-10 min) | Long cycles (20-40 min) |
| Idle time | Frequent, but short pauses | Rare, but long pauses |
| Level noise | Possible knocking, humming | Smooth humming |
| Temperature rise | Slow, ineffective | Fast, stable |
If you notice that the new motor behaves identically to the old one (constantly turning on and off), perhaps the problem lies not in the compressor, but in the control system or thermal insulation. In this case, you need to call a specialist again to measure currents and pressure.
Why can a new compressor heat up more than the old one?
New engines often have a higher energy efficiency class, but can operate at higher housing temperatures in operating mode. This is normal if the temperature does not exceed 80-90 degrees Celsius. However, if only one side of the case heats up or a metallic ringing is heard, this is a defect.
Reasons for long-term operation without shutting down
The situation when the refrigerator hums for days without entering rest mode requires immediate intervention. Most often, the reason lies in a banal freon leak, which could occur due to poor-quality soldering when replacing the compressor.
Another common reason is a malfunction of the thermostat or temperature sensor. The electronics simply “does not see” that the cold has already accumulated and continues to drive the compressor. In models with electronic control Bosch or Siemens this may be a failure of the control board.
It is also worth checking the tightness of the door. If the sealing rubber is damaged or dirty, warm air constantly flows in, forcing the cooling system to work 24/7. This is especially true for refrigerators with a bottom freezer.
- ❄️ The capillary tube is clogged: the pressure is not equalized, starting is difficult.
- 🔌 Problems with the start relay: the contacts stick, not allowing the motor to cool.
- 🌬️ Fan malfunction (in No Frost): the cold does not circulate, the sensor does not work.
It is important to distinguish between long work on the first day and constant work on subsequent days. If after 24 hours the mode has not returned to normal, you need to look for the reason in the service center.
Recommendations for extending the service life
In order for a new compressor to serve the period stated by the manufacturer (usually 10 years), it is necessary to follow a number of operating rules. First of all, provide the refrigerator with proper ventilation - the gap between the back wall and the wall should be at least 7-10 cm.
Regular defrosting (for drip systems) and cleaning the condenser from dust are also critically important. Dust deposits act as a thermal insulator, preventing heat dissipation, which causes the compressor to work overload.
Do not install the refrigerator near heating appliances or in direct sunlight. Increased ambient temperature forces the equipment to work at its limit, which is especially dangerous for a newly installed unit.
⚠️ Attention: Do not try to regulate the freon pressure yourself or open the system. This requires special equipment and a license. Any intervention will void the repair warranty.
Frequently asked questions (FAQ)
How long should the refrigerator turn off for the first time?
Normally, the first cooling cycle takes from 6 to 12 hours. If after 14-16 hours of continuous operation the refrigerator does not turn off, this is a cause for concern and contact a technician.
Is it possible to load food immediately after replacing the compressor?
You can load food only after the refrigerator has been empty for at least 4-6 hours and has reached operating temperature. Loading warm products immediately after repair is unacceptable.
Why is the new compressor louder than the old one?
A slight change in sound is acceptable during the grinding-in period (up to 3-5 days). If the noise resembles knocking, clanging or squealing, this indicates an installation defect or a defect in the part itself.
Does the refrigerator need to be allowed to settle after delivery if the compressor has been replaced?
Yes, if it was transported at an inclination of more than 40 degrees, it is necessary to allow the oil to drain into the compressor crankcase. Usually, 2-4 hours in a vertical position before turning on is enough.
Does the warranty for the replaced compressor cover the entire refrigerator?
The warranty is usually given only for the installed part and the labor to replace it (from 6 to 12 months). As a rule, the master's warranty does not apply to the remaining components of the old refrigerator.