Refrigerator owners Indesit No Frost often face a situation where the usually quiet operation of the unit is replaced by an obsessive hum or extraneous creaking. The source of the unpleasant sound in the vast majority of cases is the evaporator electric motor, which is located in the freezer behind the back wall. If action is not taken in time, the vibration may increase, and the motor itself may burn out due to overload caused by friction.
Before buying a new part, you should try to revive the old mechanism, since often the problem lies in the banal drying out of the factory lubricant. In this article we will analyze in detail how to lubricate the Indesit refrigerator fanso as not to damage the plastic bushings and ensure long-term operation of the unit. The correct choice of composition is 90% of the success of the repair.
You need to understand that the system No Frost implies constant air circulation, so the fan operates almost non-stop. Over time, the lubricant thickens, mixes with microdust and ceases to perform its functions. Your task is to remove the old composition and apply a new one, suitable for low temperatures and high rotation speeds.
Many users make the mistake of using the first means that come to hand, which leads to rapid failure of the unit. The refrigerator Indesit uses specific sliding bearings that require a special approach. In the following sections, we will look in detail at the types of lubricants that can be used, and those that are best to stay away from.
Why is the fan humming in the No Frost system
Noise in the refrigerator Indesit rarely occurs out of nowhere. The main reason is impeller imbalance or wear of the motor bushings. When the lubricant dries, the shaft begins to experience resistance, which leads to beating and a characteristic hum. Electric motor works in an aggressive environment with temperature changes and high humidity, which accelerates the degradation of lubricants.
Another reason may be ice freezing on the blades or in the area motor, which disrupts aerodynamics. However, if there is visually no ice, and the sound is similar to metal rubbing against metal, then the problem is precisely the absence of an oil film. It is important to note that modern models often use motors with plastic bushings, which are extremely sensitive to the chemical composition of the lubricant. If you ignore the problem, the shaft may jam and the motor winding will burn out. In this case, a complete replacement of the unit will be required, which will cost more than preventive lubrication. Therefore, at the first signs of discomfort, it is worth carrying out a diagnosis. Indesit Motors with plastic bushings are often used, which are extremely sensitive to the chemical composition of the lubricant.
If you ignore the problem, the shaft may jam and the motor winding will burn out. In this case, a complete replacement of the unit will be required, which will cost more than preventive lubrication. Therefore, at the first sign of discomfort, it is worth conducting a diagnosis. A critical sign is the appearance of a high-frequency whistle, which indicates that friction has reached its limit values.
⚠️ Attention: Before any manipulations inside the refrigerator, be sure to disconnect the appliance from the power supply. Working with electrical components while they are on is deadly.
It is also worth considering that sound can be transmitted throughout the body, creating the illusion that the entire refrigerator is humming. Locating the source of the noise is the first step to a solution. Place your hand on the back wall of the freezer while the compressor is running: if vibration comes from there, then the problem is in the evaporator fan.
Selection of lubricant: what can and cannot be treated
The question of how to lubricate the bearings is key. Not all oils are suitable for operation at low temperatures. Some compounds simply freeze into paraffin in the cold, blocking the rotation of the shaft. For refrigerators Indesit No Frost only synthetic oils and lubricants with a low pour point are suitable.
The ideal option is synthetic oil for sewing machines or specialized lubricants for bearings, such as Cyclone or Lithium Grease (lithium grease), if it is not contains aggressive additives that corrode plastic. Oil has also proven itself well for lubricating freezing mechanisms. The main requirement is to maintain fluidity at -20°C and below.
It is strictly forbidden to use:
- 🚫 WD-40 —this is not a lubricant, but a rust solvent. It will wash away the remnants of the old lubricant and in a week will lead to dry friction.
- 🚫 Vegetable oil - it polymerizes over time, turning into a sticky mass that tightly glues the mechanism.
- 🚫 Solidol and Litol-24 - at low temperatures they become very thick, which will create additional stress on the weak motor refrigerator.
- 🚫 Machine motor oil —may contain additives harmful to food products (in case of vapor leakage) and plastic bushings.
The optimal solution is to use silicone oil or special sprays with marked "for low temperatures". If you use a spray, apply it carefully so as not to damage the varnish insulation of the motor windings. It is best to apply oil with a syringe directly to the shaft axis.
Tools and preparation for repair
For To carry out the lubrication procedure, you do not need a complex professional tool. A basic DIY kit is enough. However, it is important to prepare the work area, as the process will require partial disassembly of the freezer. You will need good lighting and free space in front of the refrigerator.
Required list of tools:
- 🔧 Screwdrivers (phillips and flat) for removing panels.
- 🔥 Hair dryer (construction or household) for defrosting ice, if any.
- 🧴 Oil syringe or oil can.
- 🧻 Rags and degreaser (alcohol) for cleaning parts.
- 🔦 Flashlight for inspecting hard-to-reach places.
Be sure to defrost the refrigerator before starting work. Even if the system No Frost is working properly, ice may have accumulated in the evaporator niche over the years of operation. Attempting to remove a plastic panel with frozen ice will cause the fasteners to break. Leave the refrigerator turned off for at least 10-12 hours.
☑️ Preparation for repair
After defrosting, remove all shelves and drawers from the freezer. This will provide convenient access to the rear wall. Be careful with plastic elements: in the cold they become brittle, and sudden movement can lead to a crack.
Step-by-step instructions: how to lubricate an Indesit fan
The lubrication process requires care. In refrigerators Indesit the fan is usually closed with a plastic casing, which is secured with latches and screws. First you need to remove the back panel of the freezer. Often it is held on by several screws hidden under decorative plugs.
Sequence of actions:
- Remove the back panel, gaining access to the evaporator and fan.
- Disconnect the engine power supply (after remembering or photographing the position of the wires).
- Remove the fan from the mounts. It is usually held on by rubber shock absorbers or plastic clips.
- Remove the impeller from the motor shaft. Do this carefully, without jerking, so as not to break the plastic bushing.
- Clean the shaft from old dirt and grease residues with a rag soaked in alcohol.
- Drop 2-3 drops of the selected lubricant onto the upper and lower engine bushings.
- Rotate the shaft manually so that the lubricant is distributed evenly.
- Assemble the structure in the reverse order.
It is important not to overdo it with the amount of oil. Excess may drip onto food or motor windings. Fan motor should rotate easily and quietly from a light breeze. If after lubrication the shaft play remains large (the shaft dangles from side to side), then lubrication will no longer help - the bearings or the entire engine must be replaced.
⚠️ Attention: When assembling, make sure that the wires do not get under the fan impeller. Contact of the blades with the wiring will cause damage and a short circuit.
After assembly, turn on the refrigerator and listen to its operation. If the hum disappears, but a whistle appears, the lubricant may not have dispersed yet. Let the unit run for several hours. If the noise persists, check whether the impeller is touching the walls of the housing.
What to do if the fan has been removed along with part of the ice?
If you find that the fan is frozen into an ice cocoon, under no circumstances pull it by force. The plastic will burst. Turn on the hair dryer at minimum power and gently warm up the area around the shaft until the ice completely melts.
Diagnostics of faults: table of symptoms
A hum does not always mean the need for lubrication. Sometimes the problem lies in mechanical damage. Below is a table that helps determine the condition of the node by external signs and sounds.
| Symptom | Probable cause | Solution method |
|---|---|---|
| Monotonous hum that increases over time | Drying of the lubricant, wear of the bushings | Lubricating or replacing the motor |
| Crackling and knocking noise during rotation | Ingress of ice or foreign object | Disassembly, cleaning, removing ice |
| Squealing or squeaking | Complete lack of lubrication, dry friction | Urgent lubrication (risk of combustion) |
| The fan does not spin, but hums | Shaft jamming or winding malfunction | Replacing the electric motor |
| Intermittent operation | Faulty defrost sensor or wiring | Electrical circuit diagnostics |
Pay attention to the condition of the blades. If they are deformed, the fan will create vibration even with perfect lubrication. In such cases, only replacing the impeller helps. Also check the rubber shock absorbers on which the motor is mounted: if they are stiff or torn, vibration will be transmitted to the refrigerator body.
The electrical part also requires attention. Test the windings with a multimeter. The resistance should be within normal limits (usually several hundred ohms). If the resistance is infinitely high or equal to zero, the engine is burned out, and lubrication will not help. The model Indesit often uses motors with a power of 6-9 W.
Common mistakes when servicing the fan
The most common mistake is using WD-40 as a lubricant. People see the word “lubricant” on the can and spray it inside the mechanism. This gives a temporary effect of silence, but after a month the mechanism begins to hum even louder, as the solvent washes away the remnants of the factory lubricant. After WD-40, it can be extremely difficult to restore the unit.
The second mistake is trying to lubricate the fan without removing the impeller. A drop of oil that gets on the balance weight or is unevenly distributed on the blades can disrupt the alignment. This will cause the shaft to run out. Always try to apply lubricant pointwise to the rotation axis.
The third mistake is ignoring cleaning. Before applying new lubricant, old dirt must be removed. If this is not done, the abrasive dust particles will act like sandpaper, accelerating the wear of the bushings. Wipe the shaft until clean metal or plastic.
⚠️ Attention: Technical characteristics and designs of Indesit refrigerators may vary slightly depending on the year of manufacture and the specific model. Always focus on the design of your specific unit.
Do not forget about the safety of plastic. Some harsh solvents can corrode the plastic bushings or fan housing. Use only proven products, such as isopropyl alcohol for degreasing.
When lubrication no longer helps: signs of wear
There are situations when maintenance is no longer worthwhile. If you lubricate the fan with high-quality oil, but after a week the noise returns, it means that the life of the part has been exhausted. The bushings could have exhausted their service life, forming wear (increased clearance). In this case, the shaft will dangle, and no lubricant will remove the knock.
Also a sign of the need for replacement is burning of the winding. If the engine smells like burnt plastic or shows traces of soot, its operation is dangerous. The engine may overheat and cause a fire, although the probability is low, the risk exists. The cost of a new fan for Indesit is relatively low, so replacement is often more expedient than repair.
Replacing a motor takes no more than 20-30 minutes. You will need to remove the old motor, disconnect the wires (usually they are connected via terminals or twists) and install the new one. It is important to choose an analogue with similar geometric dimensions and shaft diameter so that the original impeller sits.
To summarize, we can say that regular maintenance of the system No Frost extends the life of the refrigerator. The correct choice of lubricant and careful disassembly are the key to quiet operation of your Indesit. Don’t be afraid to carry out preventive maintenance, but always evaluate the feasibility of repairs.
Is it possible to use graphite lubricant for a fan?
No, graphite lubricant is intended for high temperatures and heavy loads. In the refrigerator, it can freeze or create a conductive layer, which is dangerous for electricians. In addition, graphite is an abrasive that will quickly destroy plastic bushings.
How often should you lubricate a refrigerator fan?
In factory conditions, lubricant lasts for 5-7 years. It makes sense to do preventive lubrication when the first signs of noise appear. If the refrigerator is running quietly, you should not climb inside unless necessary, so as not to break the seal of the chambers.
Where can you find the fan markings for replacement?
The markings are usually on a sticker on the housing of the motor itself. To see it, you need to remove the back panel of the freezer. Popular models for Indesit: CFA050, CFA090, but it is better to search by the article number of your refrigerator.
Why does the fan only work when the door is open?
This is normal behavior for some circuits, but more often it’s the other way around - when the door is open, it should stop. If it only works when it is open, the door sensor may be faulty or the contacts are reversed. In the No Frost system, when the door is open, the fan usually turns off so as not to blow out cold.
How to clean the shaft from old grease?
It is best to use isopropyl alcohol or a special contact cleaner (Contact Cleaner). They evaporate quickly and do not leave a film. It is not recommended to use gasoline and acetone, as they can damage the plastic.