Noise, humming or complete cessation of cold air circulation in the refrigerator compartments LG often indicate problems with the blowing system. In modern models, especially with technology Total No Frost, the fan is the heart of the air distribution system, and its failure leads to rapid defrosting of food or the formation of ice.
Before calling a technician, many owners prefer to carry out initial diagnostics themselves, since the procedure for removing the unit does not always require complex special tools. However, in order not to damage the plastic latches or electrical connections, you need to clearly understand the structure of the specific model of your refrigeration unit.
In this article we will analyze in detail the process of dismantling the fan, consider typical mistakes during disassembly and pay attention to the safety nuances when working with electrical appliances under voltage.
Fault diagnosis and preparation for repair
The first step should always be to accurately identify the problem, since noise can be made not only by the fan motor, but also by the compressor or vibrating tubes. If you hear an extraneous knocking, crackling or whistling noise coming from the freezer, most likely the problem lies in the bearings of the electric motor or ice freezing on the blades.
To get started, you will need to turn off the power to the refrigerator by unplugging the plug from the socket. This is a critical step as working on the electrical components inside the camera without turning off the power may result in a short circuit or electric shock.
⚠️ Warning: Do not attempt to remove the back panel until the compressor has completely cooled and you have unplugged the unit for at least 15-20 minutes. Residual voltage in capacitors can be dangerous.
You will need the following tools: a Phillips screwdriver (usually PH2 size), a flathead screwdriver to carefully pry the plugs, and a multimeter to check the integrity of the motor windings. It would also be a good idea to prepare a container for melt water if you need to defrost the evaporator.
Access to the cooling system in the freezer
In most refrigerator models LG with the No Frost system, the evaporator fan is located in the freezer compartment behind the back wall. To access it, you need to free the camera from products, shelves and drawers so that nothing interferes with the work.
The back panel is usually secured with several screws, which can be hidden under decorative plugs or plastic covers. Carefully inspect the surface of the panel: sometimes fasteners are hidden in the upper part or on the sides, covered with plastic caps.
After unscrewing all visible screws, the panel is not always removed immediately. It is often held in place by plastic latches that require careful handling. A sharp tug can lead to breakage of the fasteners, so use a flat-head screwdriver wrapped in fabric to gradually unclip the fasteners around the perimeter.
☑️ Preparing to dismantle the panel
If the panel is difficult to remove, check to see if there is a screw left unscrewed at the bottom or in the area where the air ducts are attached. Sometimes access to the fan requires removing not only the back wall, but also the part the air ductthat directs the cold flow.
Removing the evaporator fan
After removing the panel, you will have a view of the evaporator and the fan attached next to it. The unit can be installed directly on the evaporator body or mounted on a separate bracket. Depending on the model LG, the fastening may vary: from simple screws to complex plastic clamps.
First of all, you need to disconnect the electrical power connector. It is usually located near the motor housing and has a safety latch. Do not pull the wires, press the connector lock and carefully pull out the block.
Next, unscrew the screws holding the fan itself. There may be two or three, depending on the design. After removing the fasteners, the fan can be removed from its seat. Be careful not to touch the fragile evaporator tubes filled with refrigerant.
Mounting features in different series
In some models of the DoorCooling+ series, the fan can be integrated into a common air circulation unit, which is removed entirely. In older models, it is mounted separately on rubber dampers.
If the fan is covered with a thick layer of ice, do not try to tear it off by force. Allow the ice to melt naturally or use a hairdryer at the minimum temperature, directing the air flow to the side so as not to melt the plastic of the case.
Checking the serviceability and replacing the component
The removed fan must be checked for mechanical damage and electrical serviceability. Visually inspect the blades for cracks and the motor shaft for play. If the shaft wobbles or is difficult to rotate by hand, the bearing is worn out and requires replacing the entire assembly.
For electrical testing, use a multimeter in resistance measurement mode. Touch the probes to the motor connector contacts. Normal winding resistance is usually several hundred ohms (the exact value depends on the motor model, often 200-500 ohms).
If the multimeter shows one (open) or zero (short circuit), the motor is faulty. Also check that there is no short circuit to the housing by touching one probe to the contact and the other to the metal part of the motor housing.
| Symptom | Possible cause | Solution |
|---|---|---|
| The fan hums, but does not spin | Bearing or winding jamming | Replacing the fan |
| Severe crackling sound during operation | Ice on the blades | Defrosting and checking the defrost sensor |
| The fan is silent | Open circuit or board malfunction | Connection with a multimeter |
| Periodic noise | Wear of bushings or imbalance | Lubrication or replacement |
When purchasing a new spare part, pay attention to the markings. Original spare parts LG have a specific code that can be found on the sticker of the old engine. The use of non-original analogues may lead to inconsistencies in seating or rotation characteristics.
Nuances of working with the No Frost system
The system No Frost implies constant air circulation, so tightness and correct assembly of air ducts are critically important. When installing a new fan, make sure that the rubber seals at the joints of the air ducts are level and not damaged.
If a freon leak was found in the system or the evaporator tubes were damaged during dismantling, independent repair becomes impossible without special equipment for evacuation and refilling. In such cases, you need to call a specialist.
A frequent cause of repeated breakdown is a malfunction of the defrost sensor. If he does not turn on the heating element, ice will again build up on the evaporator, which will block the fan a short time after the repair. Therefore, it is better to check the sensor and heating element before final assembly.
Assembling and testing the refrigerator
The assembly process is performed in reverse order. Place the fan in place, secure it with screws and connect the connector until you hear a characteristic click. Make sure that the wires are not strained and lie in the channels intended for them.
Install the back panel by snapping all the latches and tightening the screws. It is important not to overtighten the screws so that the plastic does not crack, especially if the refrigerator is no longer new and the material may have lost its elasticity.
After complete assembly, turn on the refrigerator. In the first minutes of operation, listen to the sounds: the operation of the new fan should be quiet and smooth, without beating or extraneous vibrations.
Final cooling of the chambers will occur in a few hours. During this period, do not load the products completely, let the system return to operating mode and make sure the temperature is stable.
Frequently asked questions
Is it possible to lubricate the fan instead of replacing it?
Modern refrigerator fans LG have sealed bearings installed sliding or rolling that is not intended to be serviced. Trying to drill a hole and add oil will only give a temporary effect for a couple of weeks, after which the noise will return. A complete replacement of the unit is recommended.
Why does the fan only work when the door is open?
In some models, the operating algorithm is tied to the door opening sensor. However, if the fan only turns on when the door is open and turns off when closed (or vice versa, behaves strangely), this may indicate a problem with the door sensor or control board logic, rather than the fan itself.
Where can I find the part number for my refrigerator?
The Part Number is usually located on a sticker attached directly to the fan motor housing. It can also be found in the service documentation for your refrigerator model, using the full serial number of the device.
What to do if the fan does not start after replacement?
Check the quality of the connector connection. If the connector is working, check for voltage at the contacts with the refrigerator turned on (being careful). Lack of voltage may indicate a problem with the control module or defrost sensor.
Does it need to defrost the refrigerator before removing the fan?
Yes, if there is ice on the evaporator, it must be removed. Working with an ice-covered evaporator is difficult, and an attempt to forcefully remove the panel can lead to damage to the aluminum evaporator plates and leakage of freon.