The situation when the refrigerator often turns onis familiar to many owners of household appliances. Instead of the usual hum with long pauses of rest, the unit begins to work almost continuously or turns on too often, which immediately catches your eye (and ear). This behavior not only creates discomfort due to noise, but also signals that the cooling system is unable to maintain the set temperature.
This symptom cannot be ignored, since compressorworking without interruptions, quickly wears out and can burn, and the food in the chamber will start deteriorate due to temperature fluctuations. In this article, we will look in detail at why the refrigerator turns on more often than usual, what breakdowns you can fix yourself, and when you need to call a technician.
The first thing you need to do if you notice Continuous operation technicians is to analyze the operating conditions. Often the reason lies not in the breakdown of parts, but in user errors or changes in external conditions. However, if simple methods do not help, you will have to look for the fault deeper, in the technical components of the unit.
Violation of tightness and problems with the seal
One of the most common reasons why the refrigerator often turns onis a violation of the tightness of the chamber. If warm air from the room constantly penetrates inside, the automation system detects the increase in temperature and gives the command to start motor-compressor. The main culprit here is the rubber seal on the door.
Over time, the rubber dries out, cracks or simply becomes deformed, no longer fitting tightly to the body. The seal may also become contaminated with crumbs or sticky food debris, which prevents it from sealing tightly. You can check the tightness with a simple test with a sheet of paper: clamp the sheet with the door around the perimeter and try to pull it out. If the paper comes out easily, the seal is broken.
In case of severe deformation or tears, you will need Replacing the seal. This is a critical element for energy efficiency. If the door is skewed, there may be a problem with the hinges that need to be tightened or replaced.
⚠️ Attention: If the seal is damaged, the refrigerator will work for wear, trying to compensate for the constant flow of heat. This can lead to compressor failure within several months.
Improper installation and temperature conditions
Frequent turning on of the refrigerator may be caused by its location in an inappropriate place. If the unit is too close to the wall, the radiator (condenser) on the rear wall does not have time to release heat to the environment. Heat transfer it is disrupted, and the cooling system operates under increased load.
Proximity to heating devices or exposure to direct sunlight also negatively affects the operation of the equipment. In such conditions, the refrigerator is forced to turn on more often to maintain the cold inside the chambers. The distance to the walls should be at least 5-7 cm for free air circulation.
Another factor is setting the temperature in the chambers too low. If you set the mode Super Freeze or minimum values of the thermostat, the compressor will work almost without stopping. In the summer, the load on equipment naturally increases, but if it becomes excessive, it is worth reviewing the settings.
Check whether the freezer or refrigerator door is not constantly open. Even a small gap caused by improperly stacked products can cause Continuous operation. Make sure that nothing interferes with the tight closure.
Malfunctions of the thermostat and sensors
Thermoregulator (thermostat) is the “brain” of the refrigerator, which is responsible for turning the compressor on and off depending on the temperature inside the chambers. If this element fails, it can send incorrect signals, forcing the motor to work without interruption, even when it is already quite cold inside.
In modern models with a system No Frost and electronic control, instead of a mechanical thermostat, air sensors (thermistors) are used. They can “lie” due to oxidation of contacts or damage to the wiring. The electronics reads incorrect data and does not give a command to stop the engine.
How to check the thermostat?
For a mechanical thermostat, you can try to temporarily close the contacts going to it. If the refrigerator turns off after this (provided that the temperature inside is low), then the problem is in the thermostat. However, it is better to entrust accurate diagnostics to a specialist with the device.
Symptoms of a malfunctioning thermostat often include not only frequent switching on, but also a complete failure to switch off or, conversely, refusal to switch on. In some cases, adjustment helps, but most often it requires part replacement.
⚠️ Attention: In models with an inverter compressor, diagnosing temperature sensors requires special equipment. Do not try to disassemble the electronic control unit without experience.
Problems with the refrigerant and circulation system
Freon leakage is a serious technical problem that often manifests itself in the form of continuous operation of the compressor. When refrigerant the system becomes low, the refrigerator cannot reach the required temperature. The sensors detect “heat” and command the motor to work without stopping, trying to compensate for the lack of refrigerant.
A leak can occur due to corrosion of the evaporator tubes, mechanical damage during transportation or poor-quality factory soldering. An indirect sign of a leak may be insufficient cooling of food or the formation of ice in only one corner of the freezer.
Another problem is a clogged capillary tube or filter-drier. An ice or debris plug may form in the circulation system, preventing the normal flow of freon. In this case, the compressor works with overload, trying to push the refrigerant through the blockage.
| Symptom | Probable cause | Nature of operation |
|---|---|---|
| The compressor hums, but does not cool | Freon leak | Works without stopping |
| Loud knocking, motor overheating | System clogged | Cyclic switching on with short pauses |
| The refrigerator turns off by itself | Malfunction of the start relay | Short cycles (1-2 minutes) |
To eliminate these problems you need professional repair: finding leaks, evacuating the system, replacing the filter and refilling with new freon. It is impossible to carry out this work independently without special tools.
Wear of the compressor and start relay
Compressor is the heart of the refrigerator, and its wear is one of the most expensive problems. If the motor is old, its power may drop and it can no longer cope with the load, working constantly. Internal valves may also wear out, which reduces the efficiency of refrigerant compression.
Often the cause of frequent starts or a characteristic click before starting is starting relay. This small element is responsible for starting the engine. If the relay contacts are burnt or stuck, the compressor may try to start, click and turn off, or work incorrectly.
☑️ Compressor diagnostics
It is important to monitor the compressor temperature. If it works without interruption and at the same time gets very hot (it is impossible to hold your hand for more than 3-5 seconds), this can lead to thermal breakdown of the winding insulation and a short circuit.
Replacing a compressor is a complex and expensive process that requires a skilled technician. It is often more economically feasible to consider purchasing a new refrigerator if the old one has served for more than 10 years.
The influence of the No Frost system and defrosting
In refrigerators with the system No Frost frequent switching on may be due to a malfunction of the defrosting system. If the defrost heating element, timer or defrost sensor fails, a “coat” of ice builds up on the evaporator. This ice blocks the air circulation channels.
As a result, cold air does not enter the chamber, the temperature sensor does not see the cold and requires the compressor to continue working. In fact, the refrigerator is freezing, but there is no cold in the chamber due to an ice plug.
Signs of such a problem may be:
- ❄️ A layer of ice or frost on the back wall inside the freezer.
- 🔊 The hum of a fan that touches ice.
- 🌡️ The food in the refrigerator compartment is warm, although the freezer is working.
The solution to the problem is to defrost the refrigerator during the day (completely disconnect from the network with the doors open). If after complete defrosting the problem returns after 1-2 weeks, then it is necessary replacement of elements of the defrosting system.
When it is necessary to call a technician
You can only fix simple problems yourself: clean the seal, defrost the unit, move it away from the wall or replace the light bulb. However, if you have checked all external factors, and the refrigerator continues to turn on frequently, you cannot do without a specialist.
The following symptoms are especially alarming: the appearance of oil around the compressor, a burning smell, sparking, a complete lack of cold when the engine is running. In these cases, delay can lead to permanent breakdown of equipment or even a fire hazard.
The technician will conduct diagnostics using a pressure gauge manifold and a tester and accurately determine a freon leak or electronics failure. Professional repairs will extend the life of your refrigerator and ensure safe storage of food.
Why does the refrigerator turn on immediately after it is turned off?
This may indicate a malfunction of the thermostat, which does not sense that the temperature has already been reached, or a serious freon leak, due to which the cold disappears in seconds. It is also possible for the contacts in the relay to become stuck.
Is it normal for the refrigerator to buzz for 20 minutes every 40 minutes?
Yes, this is a normal operating cycle for many models, especially in hot weather or when the chambers are fully loaded. The main thing is that there are periods of complete rest (silence) when the motor is resting.
Can frequent switching on be due to power surges?
Yes, unstable voltage in the network can interfere with the operation of the electronic control module or cause chaotic starts of the compressor. In such cases, it is recommended to use a voltage stabilizer.
How long can the compressor operate without interruption?
In normal mode, the operating cycle ranges from 10 to 30 minutes, followed by a pause. Working without a break for more than 1-2 hours is already considered an anomaly that requires attention, especially if the temperature inside does not drop.