In modern cooling systems No Frost (without frost), it is the fan that is responsible for the forced circulation of cold air inside the chambers. If you notice that food has stopped freezing, extraneous noise has appeared, or a “coat” of ice has formed in the freezer, there is a high probability that the problem lies in the operation of this unit. Understanding where exactly it is located evaporator fanwill help you carry out initial diagnostics or prepare to replace the part.
The location of the fan depends on the layout of the particular unit: it is two-chamber, single-chamber or combined. In most models, be it LG, Samsung, Indesit or Beko, this element is hidden from the user's eyes behind decorative panels. It is impossible to get to it without disassembling it, since it is located inside a heat-insulated circuit. It is important to understand that before any intervention it is necessary to completely de-energize the device in order to avoid electric shock.
In this article we will analyze in detail the design of various types of refrigerators, indicate the exact locations of the blower motors and tell you how to distinguish a serviceable part from a burnt one. Knowing these nuances will allow you to save time on calling a technician or confidently carry out repairs yourself using the right tools and approach.
The design of the No Frost system and the role of the fan
The system No Frost is based on the principle of forced air exchange. Unlike static systems with a weeping evaporator, here the cold is generated in one place (usually in a hidden niche behind the rear wall) and distributed throughout the entire volume of the chambers. The key element of this circuit is a fan, which drives air through the evaporator, cools it and directs it to the refrigerator and freezer compartments through special air ducts.
The fan is an electric motor with an impeller, enclosed in a plastic housing. Its operation is synchronized with defrost cycles: when the compressor stops and the defrost heating element turns on, the fan should also turn off. This prevents hot air from blowing through the chambers and protects the motor from overheating. If this synchronization is disrupted, the cooling efficiency drops significantly.
There are two main types of arrangement of evaporators and, accordingly, fans:
- 🌀 Single circuit: one fan drives air into both chambers at once (often found in older models or budget series).
- 🌀 Separate circuits: v The freezer compartment has its own blower motor, and the refrigerator has its own (or air is supplied through a damper).
- 🌀 Multi-flow system: several smaller fans for uniform temperature distribution in different zones (premium segment).
Understanding the type of system you have is important for troubleshooting. If the cold does not hold only in the upper chamber, and everything in the lower one is frozen solid, the problem may not be in the main freezer fan, but in the damper or additional motor of the refrigerator compartment.
⚠️ Attention: In some models with the system Multi Air Flow up to three fans can be used. An error in diagnostics (checking the wrong motor) will lead to a false conclusion about the serviceability of the system.
Location of the fan in the freezer compartment
In the vast majority of refrigerators No Frost the main fan is located in the freezer compartment. This is logical, since this is where the evaporator is located - the place where freon boils and takes away heat. To find the fan, you need to empty the freezer of food and remove the back panel.
The panel can be secured with latches or screws. In models Indesit i Ariston often you need to unscrew 2-4 screws around the perimeter. In refrigerators Samsung i LG panels are often held on by powerful plastic clips that need to be carefully pryed off with a flat screwdriver. After removing the panel, you will see the evaporator (finned radiator) and a motor-fan located next to or behind it Most often, the fan is mounted directly on the evaporator housing or on a special mounting platform behind it. It can be hidden in a plastic box that directs the air flow. In some designs, access to it is blocked by a layer of polyurethane foam or additional insulation, which must be carefully folded back..
Most often, the fan is mounted directly on the evaporator housing or on a special mounting platform behind it. It can be hidden in a plastic box that directs the air flow. In some designs, access to it is blocked by a layer of polyurethane foam or additional insulation, which must be carefully folded back.
Mounting features in different brands
In Bosch models, the fan is often integrated into a single unit with sensors, while in Atlant it can be mounted on a separate rubber vibration suspension to reduce noise.
During a visual inspection, pay attention to the condition of the impeller. It should rotate freely by hand (with the power off!). If you feel stuck, it means that the bearing has worn out its life or ice has gotten into the mechanism ice.
Where to look for a fan in the refrigerator compartment
In refrigerators with two cooling circuits or a system Twin Cooling the second fan is located in the refrigerator compartment. Its task is to ensure the circulation of cooled air in the upper compartment, regardless of the operation of the freezer. You can usually find it in the upper part of the back wall or behind the top decorative panel.
In models Electrolux and Zanussi the fan is often hidden behind a plastic cover at the very top of the chamber, where cold air rises. To get to it, sometimes you have to remove the shelves and even the top cover of the refrigerator (if it is removable inside). In other cases, access is through a niche where a lighting lamp or control panel is usually located.
If your refrigerator has an air supply system through the side walls (hidden channels), then the fan can be installed in the technological compartment, access to which is possible only after complete dismantling of the inner lining of the chamber. This is a more complex case, requiring qualifications a master.
Symptoms of a fan malfunction in the refrigerator compartment are specific: the temperature in the freezer is normal (-18°C), and in the refrigerator compartment it remains at +10...+15°C. In this case, the compressor can work almost without stopping, trying to compensate for the lack of circulation.
Access to the fan in models with a bottom freezer
The design of refrigerators with a bottom freezer (combi) has its own characteristics. Here, the main fan of the system No Frost is located in the freezer block, accessible through drawers. However, the path to it is often blocked by drawer fastening elements and guides.
To access the back wall in such models (for example, LG, Samsung, Haier), you must:
- ❄️ Completely defrost the freezer (at least 10-12 hours), since ice blocks access and can damage fragile plastic during dismantling.
- ❄️ Remove all drawers and intermediate glass shelves.
- ❄️ Remove plastic drawer guides (they are often very tight or require unscrewing screws).
- ❄️ Remove the decorative cover the top of the freezer (sometimes there is a second fan or damper there).
After removing the back panel of the freezer, you will see the evaporator. The fan in such models is often located horizontally under the evaporator or vertically to the side of it. In models Atlant with a bottom freezer, the fan can be installed in a separate insulated box in the upper part of the freezer, from where the air goes down through the channel.
⚠️ Attention: Plastic becomes very fragile at low temperatures. Do not use excessive force when unsnapping the panel fasteners; first warm them with a hairdryer, if this is permissible in the instructions, or work extremely carefully.
Nuances of searching in single-chamber refrigerators
Single-chamber refrigerators with a system No Frost (for example, some models Beko or old Stinol) have a simplified design. Here the fan is located at the top of a single chamber, often in the area of the “crying” evaporator, which is hidden behind a decorative cover. Despite the name “single-chamber”, the low temperature zone (mini-freezer) in them is also served by this fan.
Access to the fan is through the top of the refrigerator compartment. Sometimes it is necessary to remove the top cover of the refrigerator itself (from the outside) in order to gain access to the motor, which is attached to the ceiling of the internal chamber through thermal insulation. This creates certain difficulties during repairs, since you have to work “blindly” or dismantle a significant part of the body.
Such models often use one universal engine that drives air throughout the entire volume. If it stops, the temperature equalizes throughout the chamber and becomes positive, which leads to food spoilage. Checking such a fan requires removing the top decorative panel inside the chamber.
Diagnostics and signs of motor failure
Before proceeding with the replacement, you need to make sure that the problem is with the fan and not with the control board or sensor. Diagnostics begins with a visual inspection and listening to the operating unit. A working fan emits a smooth, quiet hum. Any extraneous sounds are a signal of a mechanical problem.
Main signs of a malfunction:
- 🔊 Extraordinary noise: crackling, creaking, buzzing or knocking. This indicates wear of the bearings or ice/debris getting on the blades.
- 🔊 Lack of noise: if the refrigerator is working, but the fan is silent, the motor winding may have burned out or there is no power.
- 🔊 Freezing: if the fan is not turns, the air does not circulate, and the evaporator becomes overgrown with ice, blocking the channels.
For an accurate check, you need to ring the motor windings with a multimeter. The resistance of a working motor is usually from 200 to 700 Ohms (depending on the model). If the device shows an open circuit (infinity) or a short circuit (zero), the part must be replacement. It is also worth checking the free movement of the impeller - it should not have play to the sides, but should rotate easily.
☑️ Fan diagnostics
Table of common problems and solutions
To quickly navigate the symptoms and methods of eliminating them, use the following table. It will help narrow down the search for a malfunction in the air circulation system.
| Symptom | Probable cause | Action | Difficulty |
|---|---|---|---|
| Strong hum or cracking | Bearing wear or ice on the blades | Defrosting or replacing the fan | Low |
| The fan does not spin | Winding breakage or not power supply | Voltage measurement, motor replacement | Average |
| Cold only at the back wall | Stopping air circulation | Checking the operation of the motor and dampers | Medium |
| On and off immediately | Faulty defrost sensor or board | Electronics diagnostics | High |
If after Replacing the fan, the problem persists, perhaps the problem is with the defrost sensor. It commands the fan to turn on only after the evaporator has cooled down sufficiently. A faulty sensor may simply not start the motor.
⚠️ Attention: Fan characteristics (voltage, size, mounting type, connector) may vary even within the same brand. When ordering a new part, be sure to check part number (P/N) with the old one.
Frequently asked questions (FAQ)
Is it possible to lubricate the fan instead of replacing it?
You can temporarily extend the life of the bearing by dripping sewing machine oil or WD-40 (followed by lubrication) into the rotation axis. However, this is a temporary measure: the oil will wash off or dry out, and the worn-out bearing will begin to make noise again. It is better to replace the unit immediately.
Why does the fan only work when the door is open?
This is normal operation for many models. The design of the door is such that when closed, it presses on the light and fan switch button, stopping them so as not to blow the cold out and create noise. If it is silent when the door is closed, this is a normal situation.
How to remove a fan if it is frozen with ice?
Under no circumstances tear it off by force or pick it with a knife! You will damage the blades or the evaporator. It is necessary to completely defrost the refrigerator (leave it open for a day) or carefully use a hairdryer (with caution, without overheating the plastic) to melt the ice.
Where to buy an original fan?
It is better to search by spare part code (for example, DA31-00017E for Samsung) in specialized stores of spare parts for household appliances or at trusted marketplaces. Universal fans may not fit the mounting geometry.