Sudden stoppage of the refrigerator LG often causes panic, especially when there are perishable foods inside. The first thing owners do is start looking for the cause of the failure, and one of the main suspects is the fuse link. However, finding it is not always easy, since in modern models of the Korean brand the power supply circuit can be implemented in different ways.
Many users mistakenly believe that household appliances should have an easily accessible lever or reset button, like in electrical panels. In fact fuse in refrigerators LG most often it is hidden inside the structure and requires partial disassembly for access. Understanding exactly where it is located will save you time and allow you to avoid unnecessary costs of calling a technician if the problem is solved by simply replacing the part.
In this article we will analyze in detail all possible installation locations of protective elements, consider the differences between models with the system No Frost and drip defrosting, as well as We will provide a step-by-step algorithm of actions.
The principle of operation and types of protective elements
Before we begin the search, we need to understand what exactly we are looking for. Refrigeration equipment LG uses various types of electrical circuit protection. The main element is fusewhich burns out during a power surge or short circuit, breaking the circuit and protecting the compressor and electronics from combustion.
In addition to classic fuse links, the system may contain thermal fuse. This element responds not to current, but to temperature. If the heating in a certain unit (for example, in the area of the evaporator or compressor) exceeds a critical level, the thermal fuse breaks the circuit, preventing a fire or melting of plastic parts.
Also in modern models with inverter compressors, the role of protection is often taken on by the electronic control board. It may have built-in protection mechanisms that do not require physical replacement, but require error resetting. However, the classic fuse (fuse) is still widely used in power supply circuits for fans and defrost heating elements.
⚠️ Attention: Never try to replace a blown fuse with a part with a higher rating or, worse, short-circuit the contacts with wire. This is a direct path to a wiring fire or failure of an expensive compressor.
External sources of protection: socket and cable
Before disassembling the refrigerator body, it is worth checking the external power sources. Often the problem lies not inside the unit, but in the power supply system of the apartment or house. In older models LG sometimes there was built-in protection in the surge protector or plug itself, although this is rare in modern devices.
First of all, check the distribution panel in your apartment. It may have worked circuit breaker on the line to which the refrigerator is connected. If the circuit breaker is knocked out, this may indicate an insulation breakdown in the refrigerator wire or a malfunction of the socket.
Also inspect the power cord itself. In some modifications, the cable may have an emergency shutdown button or an overload indicator. If you use a surge protector or UPS, check their condition - perhaps their internal fuse has blown, but the refrigerator itself is fully operational.
Looking for a fuse in models with the No Frost system
In refrigerators LGequipped with the system No Frost, fuses are most often located in the evaporator area. This is logical, since this is where the defrosting heating elements are located, which are one of the main consumers of energy and sources of the risk of short circuits during heavy ice.
To access this unit, you will need to dismantle the back panel inside the freezer. After removing the plastic, you will see the aluminum evaporator and the wires that go to it. It is on this harness or in the immediate vicinity of the heating element that it is usually located thermal fuse in a white ceramic or plastic shell.
Sometimes the protective element can be hidden in a plastic casing or secured to a metal bracket next to the defrost sensor. In two-chamber models No Frost a separate fuse may also be located in the refrigeration chamber circuit, if it has its own air circulation system.
Location in classic models and the compressor zone
In models with a drip defrosting system or in old two-compressor refrigerators LG the protection layout may differ. Here you often find the installation of a fuse in the compressor niche, which is located in the lower rear part of the unit.
Remove the lower rear cover (crankcase) to gain access to the motor. A fuse link may be located near the start relay or on the power input block. In some cases, it is integrated into the cable assembly and looks like a thickening in black heat shrink.
If you find blackened wires or melted plastic in the compressor area, this is a sure sign that short circuit happened here, and the fuse has fulfilled its function by burning. In such cases, replacing only the fuse link may not help - diagnostics of the motor itself is required.
Why does the fuse burn out in the compressor zone?
Most often this happens due to aging of the starting relay, which begins to spark, or due to interturn short circuits in the motor windings. Also, the cause may be a voltage surge in the general network.
Electronic control modules and internal protection
Modern refrigerators LG with displays and functions Smart Diagnosis are controlled by complex electronic boards. On the main control board, which is often located in the upper part of the case (behind the plastic cover) or in the lower niche, there may be impress fuses.
They look like small glass or ceramic cylinders soldered into the board. They can burn out due to a lightning discharge, moisture getting on the contacts or a power surge. Replacing such elements requires soldering skills and the use of a multimeter for diagnostics.
The inverter board that controls the compressor deserves special attention. It has its own protection system, but in rare cases, in case of fatal failures, it may require replacing the internal fuses. It is highly not recommended to go there on your own without experience working with high-voltage electronics.
Step-by-step instructions for replacing a fuse
The replacement process requires care and adherence to the sequence of actions. Violation of technology can lead to damage to seals or plastic elements of the case.
☑️ Algorithm for replacing the fuse
First, completely defrost the unit if you get to the evaporator. Water should not get on the electrical contacts. Use a hair dryer to speed up the process, but do not direct hot air onto plastic parts for more than 3-5 seconds.
After identifying a faulty element, carefully bite off its leads or unsolder it. Install a new fuse by twisting the contacts securely and insulating the connection with heat shrink. Make sure that the new element fits tightly to the temperature sensor, if it is a thermal fuse, since the correctness of its operation depends on this.
| Refrigerator type | Probable location | Fuse type | Complexity access |
|---|---|---|---|
| No Frost (two-chamber) | Behind the rear wall of the freezer | Thermal fuse | Medium |
| Drip system | Near the compressor (bottom) | Fuse link | Low |
| With display | On the main board (top/bottom) | Impress fuse | High |
| Side-by-Side | In the control unit or at the heating element | Combined | High |
Diagnostics and often asked questions
Correct diagnosis is the key to successful repair. Do not rush to throw away the old fuse; sometimes a visual inspection helps to understand the cause of the failure. If the insert turns black and swells, there is a short circuit. If the thread simply burns out, there is a power surge.
Use a multimeter in dial mode. An intact fuse beeps and shows resistance close to zero. The absence of a signal indicates a circuit break. Always check not only the fuse itself, but also the circuit it protects to prevent repeated breakdowns.
⚠️ Attention: The characteristics of refrigerators may vary depending on the year of manufacture and the specific modification. Before ordering a spare part, be sure to check the part number (P/N) on the body of your device with the manufacturer's catalog.
Is it possible to use a fuse with a higher rating?
It is absolutely not possible. Installing an element with a high response current will lead to the fact that during an overload, the current will flow further along the circuit, melting the wiring or burning the compressor until a fire occurs. The rating must strictly correspond to the factory parameters.
Why does the new fuse burn out immediately after switching on?
This indicates that the cause of the breakdown has not been eliminated. Most likely, the defrost heating element is faulty (shorted to the housing), the starting relay is broken, or there is a short circuit in the wiring. It is necessary to carry out in-depth diagnostics of the circuit.
Where to buy an original fuse for LG?
Original spare parts are best ordered from authorized service centers LG or specialized spare parts stores for household appliances, indicating the exact model of your refrigerator. Chinese analogues may have an error in the response temperature.
How long does replacement take?
An experienced technician needs about 30-40 minutes, including disassembly. A beginner should set aside 1-1.5 hours to carefully remove the panels without damaging the plastic, and correctly install the new element.