Modern refrigerators Indesit with system No Frost or Total No Frost are complex units where air circulation plays a critical role. If you notice that the cooling in the chamber has stopped, although the compressor is working, or, conversely, the device makes an unusually loud hum, the problem often lies in the blowing system. It is fan that ensures uniform distribution of cooled air from the evaporator to the products, and its malfunction instantly disrupts the temperature regime.
Diagnostics of this unit requires care and compliance with safety precautions, since you will have to work with electrical components. Before calling a technician or buying a new part, it is worth conducting an independent check, which often reveals banal freezing or a simple circuit break. In this article we will analyze in detail the algorithm of actions, the necessary tools and methods for identifying hidden defects in the electric motor.
It is important to understand that models Indesit may have different layouts, but the principle of operation of their ventilation systems is the same. Fan motor it starts either simultaneously with the compressor, or according to a signal from the defrost sensor, depending depending on the specific modification of the refrigerator. Understanding this cycle will help you more accurately determine the moment when exactly the fan should work, and what is preventing it from rotating at the current moment.
Typical symptoms of a malfunction of the blower system
The first sign that refrigerator fan is not working correctly is the absence of a characteristic noise of a running engine or, conversely, the appearance of mechanical sounds. When in good condition, you should hear a smooth hum of air, but if you hear a cracking, squeaking or knocking sound, this indicates physical damage to the blades or wear on the shaft bearings. Sometimes the fan may simply stop due to blocking by ice, and then the chamber will become noticeably warmer.
The second important symptom is uneven cooling of food. If the food at the back wall of the chamber is frozen into ice, and the milk on the door is sour, it means it has been broken. In systems air circulation broken. In systems No Frost the cold is generated in one place (behind the plastic panel), and without forced air passing through the evaporator, the cold simply does not enter the main volume of the chamber. This is a classic sign of the impeller stopping.
The third sign is frequent turning on and off of the compressor or its continuous operation without reaching the desired temperature. Temperature sensors in the chamber do not detect cooling, since cold air does not reach them, and the electronics command the compressor to work for wear. If at the same time you do not feel the flow of air from the holes on the back wall when you open the door (in some models the fan stops when opening, in others it continues to work), this is a reason for diagnosis. Indesit gives the command to the compressor to work for wear. If you do not feel any air flow from the holes on the back wall when you open the door (in some models the fan stops when opening, in others it continues to work), this is a reason for diagnosis.
Preparation for diagnostics: tools and safety
Before starting any inspection work electric motor it is necessary to completely turn off the refrigerator. Unplug the power cord as you will have to reach live internal components. Even if you plan only a visual inspection, the risk of an accidental short circuit or electric shock due to careless handling of the wiring is too great to ignore this rule.
To carry out high-quality diagnostics, you will need a minimum set of tools. The main device will be multimeter (tester), which allows you to check the integrity of the motor windings and the presence of voltage. You will also need a Phillips screwdriver to remove the panels, possibly a flat screwdriver to carefully snap off the plastic latches, and a knife or hair dryer to remove the ice crust if freezing is detected.
⚠️ Attention: Never try to check the operation of the fan by turning on the refrigerator in the network with the protective covers removed panels and access to live parts. This is deadly!
Prepare a container for water and a rag, as condensation and melt water may leak when defrosting or removing the evaporator unit. Cover the floor around the refrigerator to prevent damage to the flooring. Also make sure that you have good lighting, since the niche behind the back wall of the camera is usually dark, and it can be difficult to see small wiring parts and wire markings.
☑️ Tools for testing
Access to the fan: disassembling the Indesit refrigerator
B refrigerators Indesit with a system No Frost the fan is most often located in the freezer, behind the back panel. In some models it may be located at the top of the refrigerator compartment if we are talking about a dual-circuit system. To get to it, you need to empty the freezer of food, remove all shelves and drawers to gain free access to the back wall.
The back panel is usually attached to several screws and plastic latches. Carefully remove the visible screws, but do not pull the panel with force. The plastic on older refrigerators becomes brittle, and one awkward movement can cause the fasteners to break. If the panel cannot be removed, check whether the screws are still hidden under the decorative plugs or in the upper part of the niche.
After removing the panel, you will see the evaporator (radiator with tubes) and fixed nearby fan. It is often covered with an additional casing or located in the air duct. At this point it is important to assess the degree of freezing. If the entire unit is covered with a thick layer of ice, the fan may be working properly, but the defrost system is not working, and the ice simply blocked the rotation of the blades.
Nuances of location in different models
In some Indesit models with Twin Air technology, the refrigerator fan can be located separately, in the top parts of the main compartment. The principle of access to it is similar: removing the decorative cover of the chamber ceiling. Be careful when removing lampshades; they are often attached to latches that can easily be broken if handled carelessly.
If there is no ice or it is minimal, inspect the fan itself visually. The blades should rotate freely by hand (with the power off!). If you feel sticking, it means that the engine bearing has worn out its life or dirt has gotten into it. Also inspect the wires going to the motor: they should not be broken, melted or have traces of oxidation on the contacts.
Checking the electrical circuit and motor with a multimeter
The most reliable way to check fan is to ring its windings with a multimeter. To do this, you need to disconnect the terminal block with wires from the motor. Switch the tester to resistance measurement mode (Ohm) and attach the probes to the motor contacts. Normal winding resistance is usually from 100 to 500 Ohms, the exact values depend on the specific motor model Indesit.
If the multimeter shows one (infinity), this means an open circuit inside the windings. Such an engine has burned out and requires replacement. If the resistance is close to zero, an interturn short circuit has occurred, which also makes the part unsuitable for use. In both cases, repairing the windings at home is impractical; it is easier to replace the entire assembly.
| Indication on the multimeter | Diagnosis | Actions |
|---|---|---|
| 100 - 500 Ohm | The winding is intact (normal) | Check the supply voltage |
| Infinity (1) | Break winding | Replacing the fan |
| 0 Ohm or close to 0 | Short circuit | Fan replacement |
| Floating values | Unstable contact | Cleaning contacts, replacement |
It is also important to check whether it arrives voltage to the fan from the control board. To do this (with extreme caution!) turn on the refrigerator and measure the voltage on the wires going to the fan terminals. There should be 220 Volts (or the corresponding constant voltage if you have a model with a DC motor, which is less common). If there is voltage, but the fan does not spin with good windings, there is a mechanical problem (the shaft is jammed).
⚠️ Attention: Measure the voltage with the device turned on only if you have experience working with electricity. One wrong movement of the probe can lead to a short circuit of the control board.
Mechanical problems: ice, dirt and bearing wear
Often the reason for the fan stopping is trivial ice. In No Frost systems, moisture from food and air condenses on the evaporator and must be removed regularly by the defrost system. If the defrost heating element, defrost sensor or timer is faulty, ice will build up and eventually block the fan blades. In this case, the engine may hum, trying to turn over, but the ice prevents it from doing so.
To solve the problem of ice blocking, you need to completely defrost the refrigerator. Leave the unit turned off with the doors open for at least 12-24 hours. Do not use hot water or a hair dryer to speed up the process directly on the plastic and evaporator tubes, as the sudden temperature change may damage the aluminum or crack the plastic. After defrosting, collect the water and try to start the refrigerator.
If ice was not a problem, pay attention to the plain or rolling bearing of the motor shaft. Over time, the lubricant dries out and the shaft begins to jam. This is accompanied by a characteristic noise. You can try to drop a drop of machine oil onto the fan axis, but in conditions of low temperatures and high humidity inside the chamber this is a temporary measure. Most often, a motor replacement is required.
Another mechanical problem is impeller imbalance. If one of the blades is cracked or broken off, the fan will vibrate and make a lot of noise. The vibration is transmitted to the housing and can cause resonance, which users often confuse with compressor noise. Carefully inspect the plastic turbine for chips and cracks.
Replacing the fan: step-by-step algorithm
If diagnostics showed that fan motor it is faulty, it must be replaced. Refrigerators Indesit most often use universal motors, which can be found by marking or size. Remove the old fan by unscrewing the mounting screws or snapping off the plastic clips. Pay attention to the mounting method - sometimes it is necessary to move the metal bracket or rubber dampers from the old motor to the new one.
When connecting a new fan, it is important to observe the polarity if the motor is constant, although in most household models Indesit asynchronous AC motors are used, where polarity doesn't matter. The main thing is to securely fasten the terminals so that the contact does not disappear due to vibration. Use original connectors or insulate the twists with heat shrink.
After installation, reassemble the back panel in reverse order. Make sure that all wires are laid in their own channels and will not get under the fan blades or press against heating elements. Turn on the refrigerator and listen: the operation of the new fan should be quiet, smooth, without beating or extraneous sounds.
⚠️ Attention: Fan characteristics may vary (size, blade rotation angle, power). When purchasing a new part, check not only the model of the refrigerator, but also the parameters of the motor itself (voltage, shaft dimensions, dimensions).
Prevention and conclusion
If the problem has not returned, it is important to monitor the condition of the door seals. If the rubber band does not fit tightly, warm, moist air enters the chamber, which leads to increased formation of frost on the evaporator and, as a result, to freezing of the fan. Wash the seals regularly and check their integrity. fan has not returned, it is important to monitor the condition of the door seals. If the rubber band does not fit tightly, warm, moist air enters the chamber, which leads to increased formation of frost on the evaporator and, as a result, to freezing of the fan. Wash the seals regularly and check their integrity.
Also, do not put hot foods in the chamber and do not keep the door open longer than necessary. Excess moisture is the main enemy of the No Frost system. Compliance with these simple operating rules Indesit will extend the life not only of the fan, but also of the entire cooling system as a whole.
If, after replacing the fan and checking all circuits, the refrigerator continues to operate incorrectly, the control board may be faulty and does not send a signal to start the motor. In this case, you cannot do without professional electronics diagnostics. However, in 80% of cases the problem is solved either by defrosting or replacing the fan motor itself.
Is it possible to lubricate the fan instead of replacing it?
You can temporarily lubricate the bearing if the problem is only the lubricant drying out and the absence of shaft play. However, in refrigeration conditions, conventional lubricant quickly thickens or is washed out by condensation. This is a solution for a couple of weeks, after which the fan will still have to be changed.
Why does the fan only work when the door is open?
In some models Indesit there is a door opening sensor, which should stop the fan. If it works the other way around (only when open), the sensor may be stuck or the wires may have been mixed up during a previous repair. This may also be a sign of a faulty control board.
Where can I find the fan markings?
The marking is usually printed on a metal nameplate on the body of the motor itself or on a white sticker. To see it, you often need to completely remove the fan from its seat. You need to look for numbers like YJ61, YJ82 or analogues.
How much does it cost to replace a fan?
The cost of the part itself varies from 1000 to 3000 rubles, depending on the model. The work of a replacement technician usually costs another 1,500 rubles. Self-replacement allows you to save on the cost of work.