The situation when Ariston refrigerator works without interruption is familiar to many owners of household appliances. The constant hum of the engine not only irritates the ear, but also frightens you with electricity bills, which can increase significantly. Users often notice that the unit hums for days, ignoring commands to rest, which signals serious failures in the control system or heat exchange.
It is important to understand that two-compressor single-compressor models may behave differently, but the principle of continuous operation when the desired temperature is reached is violated there shouldn't be. Ignoring the problem can lead to complete failure of an expensive compressor, the repair of which is often not economically feasible. In this article, we will analyze in detail why Ariston refrigerator it does not turn off, and how to diagnose the malfunction yourself.
Before calling a technician, it is necessary to carry out an initial diagnosis to eliminate common operating errors. Sometimes the reason lies not in a breakdown, but in improper installation or overloading of the chambers with products. However, if simple methods do not help, you will have to look malfunction in electronic or mechanical components.
Primary diagnostics and external factors
Before committing damage to internal components, it is worth assessing the operating conditions of the equipment. Ariston refrigerator, like any other technology, is sensitive to the external environment. If the unit is placed close to a wall or in a niche with no gaps for ventilation, the heat from the condenser is not removed effectively. The motor-compressor is forced to work in increased mode, trying to compensate for overheating, and does not go into standby mode.
Check the tight fit sealing gum to the body. If the door does not close tightly, warm air from the room constantly enters. Sensors detect the temperature increase and command the compressor to operate continuously. Wipe the rubber band with a damp cloth, check to see if there are any crumbs or foreign objects that would interfere with a tight seal. Misalignment of the body can disrupt the geometry of the doors, causing them to no longer fit tightly, causing constant operation of the motor.
⚠️ Attention: If you have recently moved the refrigerator or cleaned it, make sure that the equipment is level. Skewing the body can disrupt the geometry of the doors, causing them to no longer fit tightly, causing the motor to constantly run.
Another factor is the temperature in the room. If refrigerator is installed next to a battery, stove or in direct sunlight, the cooling system is overloaded. In the summer or at high temperatures in the kitchen (>30°C), the equipment can work almost non-stop, which is formally the norm for such extreme conditions, but reduces the resource of the unit.
Faulty thermostat and sensors
One of the most common reasons why Ariston refrigerator turns off, there is a failure of the thermostat (thermostat). This is a mechanical or electronic device that reads the temperature inside the chambers and sends a signal to turn the compressor on or off. If the contacts inside the thermostat are “stuck” in the “on” position or the sensor transmits incorrect temperature data, the motor will hum endlessly.
In models with electronic control, NTC thermistors are responsible for temperature control. If they malfunction, the control unit “thinks” that the chamber is warm and does not give a command to stop the cooling cycle. Replacing these elements requires disassembling the inside of the refrigerator and having a multimeter to check the resistance. defrost sensors and NTC thermistors. If they malfunction, the control unit “thinks” that the chamber is warm and does not give a command to stop the cooling cycle. Replacing these elements requires disassembling the inside of the refrigerator and having a multimeter to check the resistance.
Symptoms of a thermostat failure are often accompanied by the absence of a click when turned off. In good condition, you should hear a characteristic click when the cooling cycle is complete. If refrigerator it just hums and does not stop, and the temperature inside drops below normal (food freezes), this is a sure sign that the “brain” of the system does not receive a signal to stop.
- 🔍 Absence of a characteristic shutdown click when the set temperature is reached.
- ❄️ Formation of excess “coat” or ice even in the refrigeration chamber due to continuous operation.
- 🌡️ The temperature inside the chambers is significantly lower than that set on the regulator.
- 🔊 The compressor operates without interruption, heating up to high temperatures.
Problems with refrigerant: freon leak
If Ariston refrigerator it does not turn off, but at the same time it has stopped freezing or freezes very weakly, there is a high probability of a refrigerant leak. Freon circulates through the system, taking away heat. When its quantity decreases due to microcracks in the evaporator or condenser tubes, the pressure in the system drops. The compressor runs “idle”, trying to reach the required pressure and temperature, but cannot do this.
A leak can occur anywhere in the circuit: in the foamed part of the body, at soldering points or due to corrosion of metal tubes. It is difficult to visually notice a leak, since freon is a colorless and odorless gas. An indirect sign is swelling of the back wall inside the freezer or the appearance of oily spots under the refrigerator (oil comes out along with the gas).
⚠️ Attention: Trying to refill with freon yourself without finding and eliminating the leak is pointless. The gas will come out again after a short time, and the compressor may burn out from operating with the wrong refrigerant or without proper lubrication.
Prolonged operation with low refrigerant levels is extremely dangerous for motor-compressor. It is cooled by the circulating gas. If there is a shortage of it, the motor windings overheat, which ultimately leads to an interturn short circuit and expensive repairs. Therefore, if you suspect a leak, it is better to stop operation.
How do craftsmen look for a leak?
The craftsmen use special leak detectors that react to freon vapors, or a painting method. The system is evacuated, filled with nitrogen under pressure and listen for hissing or lubricate the joints with a soap solution to look for bubbles.
Faults in the compressor and start relay
The very “heart” of the refrigerator - the compressor - can also be the cause of the problem. If start-protective relay, which is responsible for starting the engine and overload protection, is faulty, it may not open the circuit. As a result, the compressor windings are constantly energized, even if the piston itself has already stopped or works intermittently.
Sometimes the problem lies in the compressor itself: wear of the valves, a violation of the tightness of the piston group, or an interturn short circuit of the windings. In such cases Ariston refrigerator may operate continuously, but not create enough pressure for effective cooling. The motor will get very hot and consume more electricity than usual.
Checking the compressor requires a professional approach. It is necessary to measure the resistance of the windings and check if there is a breakdown to the housing. If the compressor hums but does not start, or starts and immediately knocks out the machine, these are signs of a serious mechanical or electrical breakdown.
☑️ Compressor diagnostics
Failure in the control module (for electronic models)
Modern Ariston refrigerators with No Frost system and electronic display are controlled by a complex control module. This is the “brain” of the device, which processes signals from all sensors. If a failure occurs in the control board (the triac that controls the compressor has burned out, or a software glitch has occurred), the shutdown command may simply not be received.
Often the cause is a power surge in the network, which damages the board elements. Visually, traces of burning, swollen capacitors or blackened traces may be visible on the board. In such cases, it is necessary to replace the control module or have it professionally repaired in a specialized workshop.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Humming, not freezing | Freon leak, compressor faulty | High (needs a technician) |
| Humming, freezing too much | Thermostat or sensor faulty | Medium (can be replaced yourself) |
| Buzzes, clicks, does not start | Start relay, compressor jammed | Medium/High |
| Works without stopping, errors on the display | Control module failure, sensors | High (electronic diagnostics) |
When you need to call a technician
Independent repair is only possible if you replace the thermostat (if you know how to handle the tool) or check the tightness of the doors. However, when it comes to the circulation system refrigerant, replacing a compressor or repairing electronics, you cannot do without special equipment and skills. The technician will be able to accurately determine the pressure in the system, find a leak and correctly fill the refrigerant circuit
Do not delay contacting service if refrigerator works non-stop for more than 24 hours. This is a direct road to combustion of the compressor - the most expensive component. Also
⚠️ Attention: Technical characteristics and location of components in different Ariston models may vary. Before starting work, check the technical documentation of the specific model, as the design may vary depending on the year of manufacture.
Professional diagnostics often save money in the long run. The technician will not only fix the current breakdown, but will also check the general condition of the unit, preventing repeated failures. Remember that high-quality repairs extend the life of your equipment by years.
Frequently asked questions (FAQ)
How long should an Ariston refrigerator normally operate?
In normal mode refrigerator works cyclically: it cools for about 15-20 minutes, and then rests for 30-40 minutes. The working time ratio is about 30-40%. If the equipment works more than 50% of the time or without breaks, this is a malfunction.
Can a refrigerator not turn off due to heat?
Yes, if the room temperature exceeds 30-32°C, cooling system can work practically continuously to keep the inside cold. However, even in the heat there should be short breaks. If there are none at all, check the ventilation around the case.
What to do if after defrosting the refrigerator does not turn off?
If you defrosted Ariston refrigeratorand it turned on, but has not turned off for several hours, it may not have had time to reach the temperature or it has left The temperature sensor is faulty. Let it work for 2-3 hours. If the temperature drops below -18°C in the freezer and the motor does not stop, the problem is in the thermostat.
Is it dangerous to leave the refrigerator running without interruption?
For a short time (several hours) - not dangerous. But long-term operation without stopping leads to overheating of the windings compressor, drying out of the oil and eventual jamming of the motor. This can lead to a short circuit or fire.