A sudden breakdown of a household refrigerator always becomes an unpleasant surprise that disrupts the usual way of life. If you notice that the chamber does not freeze or, on the contrary, food freezes in an ice block, the cause is often a failure. thermostat. This small but critical element is responsible for maintaining a given temperature regime, opening and closing the electrical circuit of the compressor.
Equipment owners Indesit may be faced with the need to replace this part, as over time the mechanical contacts wear out or the bellows depressurizes tubes. Self-repair requires accuracy and understanding of the unit’s structure, but is quite possible if you have a basic set of tools. In this article, we will look in detail at how to safely remove the old regulator and install a new one in order to return the refrigerator to functionality.
Before taking active steps, you need to clearly understand what exactly you will be dismantling. Thermoregulator is an electromechanical device that reads the temperature in the evaporator or inside the chamber. In models Indesit with mechanical control, it is usually hidden behind a plastic panel or located inside the lampshade. Incorrect handling of the capillary tube can lead to refrigerant leakage, so all manipulations require increased care.
⚠️ Attention: Before starting any work on disassembling the refrigerator, be sure to disconnect it from the electrical network! Working with live electrical appliances is life-threatening.
There are several signs that may indicate a malfunction of this particular unit, and not the compressor or start relay. If you see that the motor-compressor runs continuously without turning off for hours, or, on the contrary, does not start at all, although there is voltage in the network, it is worth checking the thermostat. Also, an alarming signal is the appearance of ice on the rear wall of the chamber or, conversely, a complete absence of cold when the engine is running.
Diagnostics and preparation for repair
The first stage should always be a thorough diagnosis, which will avoid the purchase of unnecessary spare parts. In refrigerators Indesit the thermostat often fails due to natural aging of the bellows metal or sticking of the contacts. To make sure that it is not working, experienced craftsmen use a multimeter to “test” the contacts in various positions of the regulator knob.
If you do not have measuring instruments at hand, you can conduct a visual inspection and check by elimination. Pay attention to the conditioncapillary tube: if it has obvious damage, swelling or signs of corrosion, replacement is inevitable. It is also worth checking whether the tube itself has moved from its regular place in the evaporator, as this may give false temperature readings.
- 🔍 The compressor hums constantly, but the cold does not accumulate - a sign that the contacts do not open.
- ❄️ The food in the main chamber turns into ice - the thermostat “does not see” the decrease in temperature.
- 🔌 The motor starts, although the light is on - a possible open circuit in the regulator.
- 💧 The appearance of water under the refrigerator may indirectly indicate problems with the defrost cycles controlled by the thermostat.
To carry out For work, you will need a minimum set of tools, which many men have in their homes. The main tools will be flat and Phillips screwdrivers, as well as pliers for working with clamps. A thin knitting needle or an awl would also be useful to carefully pry up the plastic latches without breaking them.
☑️ Preparation for dismantling
It is important to prepare the workplace in advance. Move the refrigerator away from the wall, allowing access to the back and sides. If there are products in the chamber, it is better to temporarily transfer them to another cold place or to a bowl of ice so that they do not spoil during repairs. It is recommended to cover the floor around the unit with a rag in case some water leaks out of the system during defrosting.
Features of the location of the thermostat in different models
The design of refrigerators Indesit has changed over the years of production, so the location of the thermostat may differ significantly. In older models, such as series Indesit C or Indesit IBS, the thermostat was often mounted inside the refrigerator compartment. You can get to it by removing the plastic casing that hides the lighting lamp or is located in the corner of the top of the chamber.
In more modern models equipped with a system No Frost or improved insulation, manufacturers often hide the control elements outside. In such cases, the thermostat may be located in a special compartment on the rear wall of the housing, next to the compressor, or integrated into the control unit. This complicates access, but protects the part from moisture and mechanical damage inside the chamber.
⚠️ Attention: The design of your refrigerator may differ from that described depending on the year of manufacture. Always check the technical documentation of the specific model Indesit.
To determine exactly where it is thermostat in your case, carefully inspect the interior of the camera. Look for a small hole where a thin tube goes, or a plastic cover with the words "Temperatur" or a schematic illustration of a thermometer. If there is nothing similar inside the camera, most likely the mechanism is moved outside, and access to it will be required through the back panel.
| Model type Indesit | Thermostat location | Access method | Dismantling features |
|---|---|---|---|
| Classic (single-chamber) | Inside the chamber, left or right | Removing the lamp shade | Easy access, 2-4 screws |
| Two-chamber (old series) | Inside the refrigerator compartment | Removing the decorative panel | Care is required with latches |
| Series with No Frost | Often outside, near the compressor | Removing the rear metal cover | Access to the rear wall is required |
| Built-in models | Depends on the niche and ventilation | Dismantling from a furniture niche | Difficult access, you need an assistant |
Knowing the exact modification of your device will help save time. If you are not sure about the location of the part, it is better to find the model of your refrigerator on the Internet and watch a diagram or video of disassembly. This will avoid unnecessary holes and damage to the plastic.
Removing the thermostat inside the refrigeration chamber
If diagnostics showed that thermostat is located inside, they begin by freeing up space. Remove all shelves and food from the top of the refrigerator compartment. You need to provide easy access to the ceiling or upper side wall, where the temperature control unit is usually located.
The first step is to remove the lampshade or decorative cover. In most models Indesit it is secured with latches or one or two screws. Proceed with caution: the plastic on old refrigerators becomes brittle from cold and time, and one awkward movement can crack it. Use a flathead screwdriver wrapped in a soft cloth to pry off the cover.
Once the cover is removed, the thermostat itself will be revealed to you. This is a plastic block to which wires and a capillary tube fit. It is critical to remember or photograph the order of connecting the wires before disconnecting them. A mixed-up connection diagram will result in the refrigerator either not working or not working correctly.
To remove the thermostat housing, you may need to unscrew the screws that secure it to the chamber wall or to the internal partition. After the screws are unscrewed, the block is usually removed with a slight pull towards you. However, do not pull sharply, since it is attachedcapillary tube, which goes deep into the evaporator.
- 📸 Take a close-up photo of the wire connection diagram.
- 🔧 Carefully unscrew the screws securing the thermostat housing.
- ❄️ Inspect the entry point of the tube into the evaporator for ice.
- 🧤 Wear gloves to avoid damaging the sensitive elements with your fingers.
The most delicate moment is removing the sensitive tube from the socket in the evaporator. It can sit there very tightly. Do not use brute force or try to pull it out by the tube itself with pliers - you risk damaging the thin-walled metal and breaking the tightness of the system. The tube must be carefully loosened and pulled, holding the plastic base of the thermostat.
Replacing the element when located externally
In situations where the thermostat is placed outside, the dismantling process looks different, but requires similar caution. You will need access to the back of the refrigerator. Make sure the unit is far enough away from the wall to allow you to work freely around the compressor.
Remove the lower rear cover that covers the compressor and condenser. Usually it is held on by several screws around the perimeter. After removing the metal panel, inspect the area around the motor. The thermostat can be mounted on a bracket or directly on the compressor housing, often next to the start relay.
The process of disconnecting the wires is similar to the internal arrangement: first we fix the circuit, then unscrew the contacts. Pay attention to the conditioninsulation casings on the wires. If they are cracked or melted, they must be replaced, since in conditions of high humidity and vibration this can lead to a short circuit.
⚠️ Attention: When working with the rear panel, ensure the integrity of the cooling system tubes. By accidentally bending or puncturing the tube, you will release freon, and repairs will become economically unfeasible.
The capillary tube in such models often passes through a technological hole in the refrigerator body. When replacing the thermostat, you will need to carefully push the new tube through this hole into the insulation. This should be done slowly, without jerking, so as not to jam the channel.
What to do if the tube does not fit into the hole?
If the new tube has a bend or thickening that interferes with passage, do not cut or flatten it under any circumstances. Carefully disassemble the insulation around the hole or use a silicone-based lubricant to make it easier to slide. Rough mechanical impact will break the tightness of the bellows.
After the old element is removed, compare it with the new one. They must be identical in tube length, type of fastening and, most importantly, in markings. Installing the wrong thermostat can result in incorrect temperature conditions. For example, if you put the regulator from the freezer in the refrigerator compartment, the food will either defrost or freeze.
Installation of a new thermostat and assembly
Installation of a new one thermostat is done in the reverse order of dismantling. First, carefully insert the capillary tube into the evaporator (or out if accessed from the rear). The tube should go to the same depth as the old one. Usually there is a mark or a locking ring on the tube that indicates the maximum immersion depth.
Fix the thermostat housing in its original place using screws. Make sure it fits snugly and does not wobble, as vibration from the compressor can loosen the mount over time. Now the most crucial moment is connecting the electrical wires. Check the photographs you took earlier and connect each wire to the appropriate socket.
For reliable contacts, it is recommended to use crimp terminals or high-quality insulation. You cannot simply twist the wires and wrap them with electrical tape in a refrigerator - condensation will quickly reach the twist, causing oxidation and loss of contact. If the wires had special clamping blocks, use them.
After connecting the electrics, check the reliability of all connections by lightly tugging the wires. Then reinstall the decorative panels, shades and covers. Make sure that all latches click into place. If there is a gap left somewhere, check if you have forgotten any screw or fastener.
The final stage is to plug in the refrigerator. Don't load products right away. Let the unit run idle for 2-3 hours until it reaches the required temperature and turns off. This will mean that thermostat it is working and configured correctly. If the compressor is turned off and the chamber is cold, the repair was successful.
Common mistakes and advice from experts
When repairing refrigerators on their own Indesit beginners often make typical mistakes that can negate all efforts. One of the most common is ignoring the length of the capillary tube. If the tube is too short or long, the thermostat will not read the temperature correctly, which will lead to the motor constantly turning on or insufficient cooling.
Another mistake is using the wrong lubricant or not having it where it is needed. In some models, it is recommended to seal the entry point of the tube into the evaporator with a special compound to prevent cold leakage and the formation of condensation inside the housing. Neglecting this point can lead to corrosion of the evaporator over time.
- 🚫 Do not use force when installing the tube - it is very fragile.
- 🚫 Do not leave the contacts without reliable insulation from moisture.
- 🚫 Do not turn on the refrigerator immediately if there is a lot of water inside - let it dry.
- 🚫 Do not throw away the old thermostat until you have fully checked the operation of the new one.
⚠️ Attention: If after replacing the thermostat, the refrigerator operates jerkily or makes unusual sounds, turn it off immediately. Perhaps the wrong regulator model was selected or an error was made during assembly.
It is also worth mentioning cleanliness. The inside of the refrigerator must be perfectly clean before assembly. Dirt and grease can get on the contacts or in the thermostat mechanism, which will shorten its life. Wipe the camera and technical compartments with a damp cloth and neutral detergent.
Compliance with repair technology and accuracy will allow you to extend the life of your Indesit for several more years. Remember that a high-quality thermostat is not as expensive as calling a technician to your home, so if you have direct hands, repairs are quite justified.
FAQ: Frequently Asked Questions
Is it possible to temporarily close the thermostat contacts to make the refrigerator work?
Technically, you can close the circuit and the compressor will work. However, in this case, the refrigerator will freeze continuously until you turn it off manually. This will lead to freezing of the evaporator, food spoilage and possible compressor failure due to overload. Use this method only for short-term diagnostics, but not for permanent operation.
How to understand that the thermostat is selected incorrectly?
If after replacement the refrigerator does not turn off at all, even when it is already very cold in the chamber, then the temperature range of the new thermostat is not suitable. If it turns off too early, without having time to gain cold, the problem is also in the characteristics of the selected part. The markings on the case must completely match the original.
Is it necessary to defrost the refrigerator before replacing the thermostat?
Yes, complete defrosting is required. Water from melting ice can get onto electrical contacts or inside the new thermostat, causing short circuits or corrosion. In addition, in a defrosted state, it is easier and safer to manipulate the parts inside the chamber.
How much does a new thermostat cost for Indesit?
The cost depends on the specific model and manufacturer of the spare part. Original parts may cost more than analogues. On average, the price varies within affordable limits, which makes independent replacement cost-effective compared to the services of a service center.
What to do if the capillary tube of the new thermostat is longer than the old one?
The excess tube can be carefully rolled into a ring and placed in the free space behind the back wall or in a specially designated place without bending it. The main thing is not to shorten the tube and not to break its tightness. The bending radius should not be too small so that the metal does not crack.