Why the refrigerator works without stopping: reasons and repairs

The situation when the refrigerator runs non-stopis familiar to many owners of household appliances. Instead of the usual rhythmic hum and periodic pauses, the unit emits a monotonous low-frequency hum for days on end. This is not just an annoying noise, but also a sure sign that the cooling system is working in emergency mode, trying to reach the set temperatures, but cannot do so.

Constant operation of the compressor leads to its overheating and rapid wear, as well as a significant increase in energy bills. If you notice that your refrigerator Indesit, Bosch or any other brand has stopped turning off, you need to urgently look for the reason. Ignoring the problem can lead to complete failure of an expensive motor-compressor.

In this article we will analyze in detail the main technical faults, external factors and operating errors that cause continuous operation of refrigeration equipment. Understanding these processes will help you make the right decision: call a technician or try to fix the problem yourself.

Malfunctions of the thermostat and temperature sensors

One ​​of the most common reasons why the refrigerator does not turn off is the failure of the thermostat. This mechanical or electronic component is responsible for controlling the temperature inside the chambers. If the contacts are stuck in the "on" position or the electronic sensor is sending incorrect data to the control board, the compressor will run continuously.

In mechanical models, the thermostat is often located inside the refrigerator compartment and is controlled by a knob. Its failure may be caused by loss of tightness of the bellows, which contains a temperature-sensitive medium. In this case, the system “thinks” that the chamber is warm and does not give a command to stop the engine.

• 🔧 Symptoms: The refrigerator freezes too much, the food in the refrigerator compartment freezes, but the motor does not stop.
• ❄️ Diagnostics: To check the mechanical thermostat, you can temporarily close its contacts; if the compressor starts (or stops when opened), the problem is in the sensor.
• 📟 Electronics: In models with No Frost and electronic control, air sensors often fail, which are easily replaced.

Replacing the thermostat is a procedure that can be done with your own hands if you have basic skills and tools. However, in modern models with complex electronics, it is better to entrust this work to a specialist so as not to upset the settings of the control board.

Leakage of refrigerant (freon) and violation of tightness

If the refrigerator hums, but does not freeze or it freezes very weakly, while working without interruption, there is a high probability of a refrigerant leak. Freon circulates in a closed loop, and if a micro-hole has formed somewhere, the pressure in the system drops. The compressor tries to compensate for the lack of cold, working for wear, but cannot reach the target temperature.

A leak can occur anywhere in the circuit: in the foamed part of the case, in the condenser on the back wall or in the evaporator. Often the cause is metal corrosion or mechanical damage during transportation or cleaning. It is difficult to visually notice a leak, since the gas is colorless and odorless.

⚠️ Attention: Refilling the refrigerator with freon yourself is prohibited and dangerous. To search for leaks and evacuate the system, specialized equipment and skills in working with refrigerants are required.

An indirect sign of a leak may be a hot condenser (grid at the back) only at the beginning or, conversely, cold along the entire length, as well as the absence of characteristic gurgling in the tubes when the compressor is running.

Wear of sealing rubber and problems with the door

Often the reason for continuous operation lies not in the internal components, but in a banal loose fit of the door. If sealing rubber is worn out, dirty or deformed, warm air from the room constantly enters the chamber.

The equipment reacts to an increase in temperature by turning on the compressor. Because heat is constantly supplied, the cooling cycle never completes. This is a common problem with older refrigerators or models whose doors were often slammed shut.

• 🚪 Check: Pinch a piece of paper between the door and the body around the perimeter. If the paper is easily removed without resistance, the seal is broken.
• 🧼 Care: Regularly wipe the elastic with a soft cloth and soapy water, removing grease and crumbs that interfere with a tight fit.
• 🔥 Restoration: You can try to straighten a deformed seal with a hair dryer or boiling water, but the most effective way is to replace it with a new one.

It is also worth checking the door hinges. If they are skewed, the door will warp, and even a whole rubber band will not provide the required tightness. In such cases, adjustment or replacement of the hinges is required.

Improper installation and external factors

Operating conditions directly affect the efficiency of the refrigerator. If the unit is installed close to the wall, in a niche without ventilation or next to (battery, stove, direct sunlight), heat exchange is disrupted.

The compressor has to work harder to remove heat through the condenser. In the summer, when the temperature in the kitchen is high, the load on equipment increases many times over. In such conditions, the refrigerator can operate almost without stopping, which for some models in the heat is acceptable, but undesirable.

⚠️ Attention: The minimum distance from the back of the refrigerator to the wall should be at least 5-7 cm for free air circulation. Failure to comply with this rule leads to overheating.

In addition, frequent opening of the door, loading a large amount of warm food or a loose freezer door also causes the equipment to work in increased mode.

Failure in the operation of the control board and the starter relay

In modern models with a system No Frost and electronic control, the board is responsible for all processes. If it malfunctions, it may send incorrect commands to the compressor. Also, the problem may lie in the start protection relay.

The start relay is responsible for starting the engine and protecting it from overloads. If the relay contacts are “burnt” or the mechanism is stuck, the circuit may not open even after reaching the desired temperature. In this case, the motor continues to hum, consuming current.

Diagnostics of electronics requires a multimeter and knowledge of circuit design. If you are not confident in your abilities, it is better to contact a service center, since incorrect replacement of board components can lead to the compressor burning out.

Wear of the compressor and the need for replacement

The most serious and expensive reason is the wear of the compressor itself motor-compressor. Over time, the mechanical parts wear out, compression drops, and the unit loses the ability to create the necessary pressure for freon circulation.

In an attempt to compensate for the loss of power, the engine runs continuously. This is often accompanied by strong heating of the compressor housing, humming and vibration. If the compressor fails, its repair is usually impractical - a complete replacement is required.

⚠️ Attention: Operating a refrigerator with a faulty compressor is a fire hazard. If there is severe overheating and a burning smell appears, immediately unplug the device.

The service life of modern compressors is 10-15 years. If your refrigerator is older than this period and has started working non-stop, it may be time to think about buying a new appliance, since replacing the motor can cost up to 50% of the price of a new device.

Prevention and operating rules

To extend the life of the refrigerator and avoid situations where it works without interruption, it is important to follow the operating rules. Regular defrosting (for drip systems), cleaning the drainage hole and checking the integrity of the seal are basic care procedures.

Do not place hot foods in the chamber, let them cool to room temperature. This will reduce the load on the cooling system. Also make sure that the ventilation holes inside the chambers are not blocked by food, which is especially important for the system. No Frost.

• 🧹 Cleanliness: Once every six months, vacuum the condenser at the back of the refrigerator to remove dust and animal hair.
• 🌡️ Temperature conditions: Do not set the regulator to maximum unless necessary, especially in winter.
• 🔌 Electrical equipment: Use a voltage stabilizer if there are surges in your network that can damage electronics.

Following these simple recommendations will help avoid premature wear of parts and save your budget on repair.

When is it time to call a technician?

If simple methods like checking the door tightness and defrosting did not help, and the refrigerator continues to work without stopping, there is probably a technical problem. Independent repair of components related to refrigerant and complex electronics can be dangerous and ineffective.

The technician will be able to carry out accurate diagnostics: measure the pressure in the system, check the current consumption of the compressor and ring the sensors. Professional repairs are often cheaper than buying a new refrigerator, especially if one part needs to be replaced.