The situation when a refrigerator Indesit begins to work in increased mode, turning into a real freezer, is familiar to many owners of this equipment. Even when the temperature regulator is set to the minimum value (usually the number 1 or the Min position), the food in the refrigerator compartment becomes covered with ice and the vegetables freeze. This is not just an inconvenience, it is a signal that there is a failure in the refrigerant circulation or compressor control system.
Excessive cooling often causes the compressor to run almost non-stop, which significantly reduces its life and increases energy bills. In some models with a system No Frost this can lead to freezing of the evaporator and failure of the fan. It is important to understand that ignoring the problem at an early stage can lead to expensive repairs.
In this article we will analyze in detail the mechanical and electrical reasons why Indesit refrigerator ignores the thermostat settings. We will look at both simple settings that you can fix yourself, and complex technical faults that require specialist intervention. Understanding the operating principles of your model will help you quickly diagnose the problem.
Incorrect setting of the thermostat and operating mode
Before looking for complex breakdowns, it is worth eliminating the human factor. In models Indesit with mechanical control, the thermostat is a rotary switch with a scale from 1 to 5 (or 7). Many users mistakenly believe that the number 5 means +5 degrees, when in fact it is maximum power cooling. If the knob is turned to maximum, the refrigerator will freeze until the emergency mode is activated or the chamber freezes over.
However, if you set the knob to "1" or "Min", and the temperature still drops below zero, the problem may lie in the switch mechanism itself. In older models, over the years, the plastic rod that transmits rotation may slip. Visually, it will seem to you that the knob is at a minimum, but the internal axis of the thermostat is turned to maximum cooling.
It is also worth paying attention to the “Super Freeze” mode. In some combination models Indesit activation of this mode may force the compressor to run for a long time, ignoring standard shutdown cycles. Usually this mode turns off automatically after 24-48 hours, but if the button is stuck or the mechanism is jammed, the refrigerator will work for wear and tear.
- ❄️ Check the position of the thermostat knob: make sure it is not turned to the maximum (numbers 4-7).
- 🔧 Inspect the regulator rod: try to gently twist the knob to both sides to make sure that it does not scroll idle.
- 🔌 Check the Super Freeze button: if it is lit or recessed, try turning off this mode forcibly.
- 🌡️ Give the equipment a rest: unplug the refrigerator for 15-20 minutes to reset electronic errors, if any.
It is important to note that in models with electronic control (where the temperature is set in degrees on the display), the situation may be due to a software failure of the controller. In this case, a simple power reset often does not help, and a flashing or replacement of the control board is required.
Malfunctions of the thermostat (thermostat)
The most likely reason that Indesit refrigerator freezes very muchis the failure of the thermostat. This device is responsible for opening the electrical circuit when the set temperature is reached. If the contacts inside the thermostat “burn” and stick in the closed position, the compressor receives power constantly and does not turn off, continuing to freeze the chamber.
In mechanical thermostats (for example, series TAM-133 or K-59often used in Indesit) the sensitive element is a bellows tube filled with freon. When cooled, the freon contracts and the contacts open. If there is a leak of working gas in the thermostat system or deformation of the bellows, it stops responding to changes in temperature in the chamber. For a refrigerator, this means “blindness” to the cold.
⚠️ Attention: Replacing the thermostat requires care. The capillary tube must not be kinked or damaged, otherwise the new regulator will also not work correctly. When installing a new tube into the chamber, you must use a special heat-conducting gel or electrical tape for tight contact.
Diagnostics of the thermostat is possible using a multimeter in dial mode. At room temperature the contacts should ring. If you place the sensing tube in the freezer (or apply cold), the circuit should open. If this does not happen, the part must be replaced. Also, a sign of a malfunction may be the absence of a characteristic click when changing the position of the handle.
How to check the thermostat with a multimeter
To check, remove the terminals from the thermostat. Set the multimeter to resistance measurement mode (ohms). Touch the probes to the terminals. If the device shows “0” or a value close to it, the circuit is closed. Cool the thermostat tube (you can put it in the freezer for 10-15 minutes or spray it with refrigerant). If after cooling the resistance does not change (remains “0”), it means that the contacts are stuck or the gas has evaporated. Replacement is required.
Problems with temperature sensors in the No Frost system
In modern models Indesit with the system No Frost or Full No Frost electronic sensors (thermistors) perform the function of a mechanical thermostat. They are located at different points: in the refrigerator compartment, in the freezer compartment and on the evaporator. If the sensor that controls the air temperature in the refrigerator compartment gives incorrect readings (for example, it tells the controller that it is +15°C, although in reality it is already -5°C), the system will continue cooling.
A frequent problem is oxidation of the sensor contacts or violation of its calibration. Over time, the resistance of the thermistor changes nonlinearly. The controller “thinks” that the chamber is warm and instructs the compressor to work longer. As a result, ice forms on the shelves and food spoils.
| Sensor location | Malfunction symptom | Probable cause |
|---|---|---|
| Air intake (AC) | The refrigerator is not turns off, food freezes | Sensor is lying about high temperature |
| Evaporator (Freezer) | Incorrect defrost operation, ice | Open circuit or oxidation |
| Air intake (MK) | Freezing in the freezer | Resistance calibration offset |
To replace sensors in the system No Frost partial disassembly of the inner lining of the refrigerator compartment or removal of the rear panel is often required freezer. It is important to use original spare parts or high-quality analogues with identical resistance at a certain temperature (usually 25°C or 0°C), otherwise the system will not work correctly.
Freon leakage and malfunctions of the compressor
Paradoxically, a refrigerant (freon) leak can also lead to increased frost in one of the chambers, although this is usually accompanied by insufficient cooling. In two-chamber refrigerators Indesit with one compressor, freon passes first through the freezer and then through the refrigerator. If there is a leak or blockage in the refrigerator circuit, all the cold will go to the freezer, but the upper compartment may be warm. However, if the control system is trying to compensate for the lack of cold, it can keep the compressor on constantly.
A more dangerous situation is a malfunction of the compressor. If the compressor loses performance (wearing valves), it does not create enough pressure for a normal cycle. But if it does not turn off because the temperature is not reached, food may suffer from uneven but prolonged exposure to low temperatures in areas of direct contact with the cooling elements.
It is also worth mentioning the “oil plug” problem. If oil has accumulated in the capillary tube, the circulation of freon is disrupted. This can cause localized hypothermia at the beginning of the circuit (usually the back wall of the freezer or the bottom of the refrigerator compartment), while the rest of the volume will be warm. The user sees ice in one corner and turns the control to minimum, but the situation does not change, since the physics of the process is broken.
- 🔍 Inspect the tubes at the back of the refrigerator: the presence of oily spots may indicate a leak.
- 👂 Listen to the compressor: the hum should be even. An intermittent sound or clicking sound indicates problems with starting.
- ❄️ Check the uniformity of cooling: if the ice is only in one corner, the capillary may be clogged.
- 🌡️ Measure the temperature at different points: use a liquid thermometer, placing it in a glass of water on a shelf.
⚠️ Attention: Refilling the refrigerator with freon yourself is prohibited and dangerous. Finding leaks and evacuating the system requires specialized equipment. An attempt to “just add gas” without eliminating the cause of the leak will lead to repeated failure in a short time.
The influence of sealing rubber bands and tightness
It would seem that a violation of tightness should lead to a lack of cold, but in the case of Indesit and other modern brands, this has the opposite effect. If the rubber seal on the door does not fit tightly, warm, moist air from the room constantly enters the chamber. Sensors detect the temperature increase and command the compressor to work continuously to compensate for the heat gain.
As a result, the refrigerator operates at its maximum capacity. Moisture from the incoming air condenses on the coldest surfaces (back wall, shelves near the cold outlet) and freezes instantly. A thick layer of ice forms, which further impairs heat transfer, causing the equipment to freeze even more. This is a vicious circle that leads to excessive energy consumption.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If it pulls out without resistance or with very light force, it’s time to change the rubber band or adjust the door hinges. Also, the rubber could be deformed from time or contamination.
☑️ Checking the door tightness
When you need to call a specialist: difficult cases
There are a number of situations when self-repair is not only It won't help, but it will also make the situation worse. If, after replacing the thermostat and checking the seals, Indesit refrigerator continues to freeze at a minimum, the problem may lie in the electronic control module. "Glitches" of the board, breakdown of power switches or malfunction of the relay can lead to the fact that the command to turn off the compressor simply does not arrive.
A master is also needed if doors need to be re-hung or a complex evaporator replacement is required. In models with a foamed evaporator (when the tubes are mounted in the housing), a freon leak requires the installation of an external evaporator (“crying” or on the back wall), which is a complex technical operation.
Do not forget about the warranty. If your refrigerator is less than 3 years old (the warranty period for the main components is often 3 years, and for the compressor - up to 10 years, depending on the region and model), any intervention that breaks the seals will lead to a refusal of warranty service. In this case, it is better to immediately contact an authorized service center. Indesit is often 3 years, and for a compressor - up to 10 years depending on the region and model), any intervention that breaks the seals will result in denial of warranty service. In this case, it is better to immediately contact an authorized service center.
Frequently asked questions (FAQ)
Why the refrigerator Is indesit freezing in only one corner?
This is a classic sign of a blockage in the capillary tube or a violation of freon circulation. The refrigerant cannot go through a full cycle and boils (cools) only at the beginning of the circuit. The system needs to be purged and the filter-drier needs to be replaced.
Is it possible to regulate the temperature in an Indesit refrigerator without a thermostat?
No, the thermostat is the main control element. Without it, the compressor will either not turn on or will work constantly. Temporarily, in an emergency, some technicians close the contacts to check, but the refrigerator cannot be operated this way - it will defrost the food or fail.
What to do if vegetables freeze in the refrigerator at a minimum?
Urgently adjust the thermostat. If it is still cold at "1" or "Min", place a layer of cardboard or fabric under the food to insulate it from the cold shelves. But this is a temporary measure - you need to look for the reason for the constant operation of the compressor.
How often do you need to defrost the Indesit No Frost refrigerator?
The No Frost system assumes the absence of ice, but preventive defrosting (shutdown for 1 day with the doors open) is recommended to be carried out once a year for hygienic cleaning and checking the operation of the system defrost.