An extraneous hum, whistling or the complete absence of cold while the compressor is running is a sure sign that there is a failure in the air circulation system. In modern models LG with the system No Frost a special fan located behind the rear wall of the freezer is responsible for the uniform distribution of the cold flow. If this part fails, the evaporator becomes overgrown with ice, and the products stop cooling, which requires immediate intervention.
Independent replacement of this unit is a completely solvable task for a person with basic skills in handling tools and observing safety precautions. You do not have to call a technician if you are willing to carefully study the design of your unit and act consistently. The main thing is to correctly diagnose the problem and prepare the necessary tools before starting work.
In this article we will analyze in detail the process of diagnosing a malfunction, dismantling the old part and installing a new component. You will learn how to distinguish a fan breakdown from other problems, which models are suitable for replacement and what design nuances LG you should pay special attention to so as not to damage the plastic or wiring.
Fault diagnosis: when replacement is needed
Before disassembling the refrigerator, you need to make sure that the problem lies in the fan. Users often confuse the noise of the compressor with the hum of the evaporator motor. The main symptom is a characteristic sound: a crackling, grinding or intermittent humming sound coming from the depths of the freezer. In some cases, the engine may simply jam, and then you will only hear a quiet hum without rotation of the blades.
Another sign is uneven cooling or a complete absence of cold when the compressor is running. If you notice that a massive “coat” of ice has formed on the back wall of the freezer, and the food in the main chamber is warm, this indicates a violation of air circulation. Fan could stop due to freezing or mechanical wear of the bearings. You can check this by opening the freezer door: in many models LG when the door is opened, the fan should stop, but if it did not work before this point, the problem is obvious.
⚠️ Attention: If you hear a loud cracking sound of ice, do not try to forcefully spin the blades. This can lead to breakage of the plastic blades or damage to the motor shaft.
It is also worth paying attention to the error code that may appear on the display (if your model has one). Although LG more often shows sensor errors, indirect signs help narrow down the search. If the compressor runs continuously without shutting down and the temperature does not drop, this often indicates that the cold is not spreading through the chambers.
Preparing tools and selecting a new part
For successful repairs, you will need a minimum set of tools. There is no need to buy specialized equipment; what you usually have in your home drawer is enough. It is important that the tools are in good working order, especially screwdrivers, so as not to tear off the slots on the screws, which in refrigerators LG are often quite tight.
List of necessary equipment:
- 🔧 Phillips screwdriver (PH2) - the main tool for removing panels.
- 🔧 Flat-head screwdriver - will be needed to carefully snap off the plastic latches.
- 🔧 Hair dryer (construction or household) - may be required to defrost ice if it has blocked the fan.
- 🔧 Multimeter - to check the integrity of the motor winding (optional, but preferably).
- 🔧 A container for water and a rag - in case water leaks during defrosting.
When choosing a new part, it is critical to know the exact model of your refrigerator. Fans LG may differ in diameter, shaft length, mounting type and connector. Original spare parts are marked, for example 4681JJ1008A or similar. The use of non-original analogues is possible, but requires careful comparison of geometric dimensions and electrical parameters.
Safety precautions and preparation of the refrigerator
Working with electrical appliances requires strict adherence to the rules electrical safety. The first and most important step is to completely disconnect the refrigerator from the electrical network. Don't just turn off the button, if there is one, but unplug the cord from the outlet. This will protect you from electric shock and prevent accidental starting of the compressor or fan during operation.
The second stage is defrosting. Even if visually there is not a lot of ice, there may be hidden ice inside the housing, behind the panels. If you begin disassembling without completely defrosting, water may get on the electrical contacts or wiring, causing a short circuit. Leave the refrigerator turned off with the doors open for at least 12–24 hours.
Empty the freezer of food and remove all removable elements: shelves, drawers, ice trays. You need full access to the interior space. Cover the floor around the refrigerator with rags or towels, as when dismantling the panels, residual moisture may leak out.
☑️ Preparation for repair
Removing the rear panel of the freezer
Access to the fan in refrigerators LG s system No Frost usually located behind the back wall of the freezer. The design may differ slightly depending on the series (for example, LG GA or LG GC), but the general principle is the same. In some models, you will also need to remove the top cover of the freezer or even the door if it interferes with your view.
The process of removing the panel is as follows:
- Inspect the back wall inside the freezer. Find all visible screws. They may be hidden under decorative plugs or plastic caps.
- Carefully remove the plugs using a flat-head screwdriver. Be careful, plastic becomes brittle in the cold.
- Unscrew all fastening screws. In models LG there are usually from 4 to 6 pieces.
- The panel can be held on by latches. If the screws are unscrewed, but the wall does not come off, gently (carefully) pull it towards you, starting from the lower or upper corner.
Behind the panel you will see the evaporator (metal radiator) and itself fan. It is often mounted in a plastic housing or directly on a bracket next to the evaporator. If you see a lot of ice, do not touch the parts with your hands - let the ice melt or use a hair dryer at the minimum temperature, directing the air flow carefully so as not to melt the plastic.
⚠️ Attention: Do not use sharp objects (knife, chisel) to chip ice. You may damage the evaporator tubes, and then repairs will become economically unfeasible due to freon leakage.
What to do if the panel cannot be removed?
If the panel cannot be removed, check whether you forgot to unscrew the screws at the top of the chamber or under the tray ice maker. Sometimes the fasteners are hidden under stickers.
Replacing the fan: step-by-step instructions
When access to the assembly is gained, carefully inspect the motor mount. In most cases, it is held on by two or three screws, and is also connected to the general electrical circuit of the refrigerator. Before unscrewing the case itself, you need to disconnect the power connector.
The connector may be tight. Grasp the plastic part of the chip (not the wires!) and, shaking it from side to side, pull it. If the connection has oxidized or frozen, you can gently warm the joint with a hairdryer. After disconnecting the wire, move it to the side so that it does not interfere.
Now you can dismantle the old fan:
- 🔩 Unscrew the screws securing the fan housing to the wall or bracket.
- 🔩 Remove the assembly. Pay attention to the rubber dampers or bushings, if any, they need to be moved to the new unit.
- 🔩 Compare the new and old part. Make sure that the direction of rotation and the location of the mounting holes match.
- 🔩 Install the new fan in place, secure it with screws and connect the connector until you hear a characteristic click.
After installation, check that the wires are not twisted and do not touch the blades. The blades should rotate freely, without touching the walls of the housing. Reassemble the structure in the reverse order: install the back panel, tighten the screws, return the shelves and drawers.
Comparison of fan models and compatibility
Not all fans are the same. When ordering spare parts, it is important to consider not only the brand, but also the technical characteristics. Below is a table that helps you understand the main differences between components for refrigerators LG.
| Parameter | Original LG part | Universal analogue | Chinese replica |
|---|---|---|---|
| Work resource | High (50,000+ hours) | Medium (30,000 hours) | Low (10,000 hours) |
| Level noise | Minimum (< 35 dB) | Average | Possible hum |
| Dimensional accuracy | 100% match | Requires adjustment | Often does not match |
| Price | High | Average | Low |
The use of universal analogues is justified if the original is discontinued or its delivery takes too long. However, in the case of a motor that works around the clock, the savings may backfire: a cheap motor will start humming after six months or jam again. The brand of bearing in original parts fan, which operates around the clock, the savings may backfire: a cheap motor will start humming after six months or jam again. Bearing brand in original parts LG is usually of higher quality.
If you choose an analogue, make sure that the supply voltage is the same (usually it is 220-240V or 12-24V DC depending on the control model). An error in voltage will lead to instant burnout of the new part or control board.
Checking operation and common errors
After assembly, do not rush to load products. Plug in the refrigerator and listen. In the first minutes of operation, the sound of the compressor starting can be heard, but there should be no extraneous noise from the fan. Check the airflow: put your hand near the air duct openings in the freezer and the main chamber - you should feel a flow of cold air.
What mistakes are most often made when replacing:
- 🚫 Insufficient defrosting: Remaining moisture inside the case freezes and after a couple of days blocks the blades again.
- 🚫 Bad connector connection: If the contact is not full, the fan may work jerkily or not start at all.
- 🚫 Ignoring the state of the defrost sensor: Often, along with the fan, the temperature sensor also fails. If you do not replace it, the icing problem will recur.
⚠️ Attention: If after replacement the fan hums but does not spin, the control board or start relay may be faulty. In this case, professional electronic diagnostics are required.
Let the refrigerator run idle for 2-3 hours. During this time, it should reach operating mode, and the temperature in the chambers will stabilize. If everything went well, you will give your unit a second life and save a significant amount on the services of a service center.
Is it possible to lubricate the fan?
Theoretically, it is possible if you remove the retaining ring and get to the bearing. However, in a refrigerator, the lubricant quickly thickens in the cold, so replacement is a more reliable solution.
How long does it take to replace a fan?
For an experienced technician, the process takes about 30–40 minutes. For a beginner who is disassembling a refrigerator for the first time LG, taking into account the time for defrosting and carefully disassembling the panels, it is worth setting aside 1.5–2 hours.
Where can I find the spare part number for my model?
The part number is indicated on a sticker glued directly to the motor body. It can also be found in the service documentation (service manual) for your specific refrigerator model by entering it into a search engine.
Why does the new fan immediately freeze?
This indicates a malfunction of the defrost system. Most likely, the problem is not in the fan itself, but in the defrost heating element, defrost sensor or timer. The fan is only a symptom, not the cause of icing.
Is it possible to temporarily remove the fan and use the refrigerator?
No. Without air circulation, the freezer will turn into an ice block, and the temperature in the main chamber will rise to room temperature. The food will spoil, and the compressor will burn out from overload, working without stopping.
What is the difference between a freezer fan and a refrigerator fan?
In dual-circuit systems No Frost there are two of them. The freezer fan is usually more powerful and resistant to low temperatures. The refrigerator fan (if any) can be smaller and operate at above-zero temperatures.