Modern refrigerators LG with the system No Frost are known for their reliability, but even they have malfunctions. Often, owners are faced with the problem of ice freezing in the freezer compartment, which leads to incorrect closing of the doors or poor cooling of food. In most cases, the root of all evil lies in a malfunction of the defrost system, access to which is blocked by the rear panel.
Independent disassembly of the unit may seem like a daunting task for an unprepared person, but the design LG is thought out quite logically. To diagnose the evaporator, check Defrost heating element or replace the sensor, you must carefully remove the inner lining of the chamber. This requires a minimum set of tools and strict adherence to the sequence of actions.
In this article we will analyze in detail the process of removing the back wall, paying special attention to the nuances of fastening and possible risks. You'll learn how to avoid damaging fragile plastic and where key cooling system components are located. Proper preparation and understanding of the unit's structure will save time and money when calling a technician.
Preparation of the workplace and necessary tools
Before starting any manipulations with an electrical device, it is necessary to ensure safe working conditions. First of all, the refrigerator LG should be completely defrosted and disconnected from the power supply. This is a critical step because working on internal components may expose contacts to moisture or cause accidental short circuits.
Empty the freezer of food and remove all removable shelves, drawers, and ice trays. You will need easy access to the entire interior space. For ease of maintenance, it is recommended to move the unit away from the wall in order to be able to approach it from all sides, although the main work will be done from the front.
To perform dismantling, you will need a minimum set of tools, which are usually found in every home:
- 🔧 Phillips screwdriver (usually PH2 size) for unscrewing screws.
- 🧊 A plastic spatula or an old bank card for unlatching the latches.
- 🔦 A flashlight for better illumination of the depth of the camera.
- 🧤 Gloves to protect your hands from sharp edges and cold.
⚠️ Attention: Never use sharp metal objects (knives, screwdrivers) for prying off plastic panels. There is a high probability of damaging the integrity of the evaporator or puncturing the freon pipes, which will lead to expensive repairs.
Prepare a container for water in advance, since when removing the panel, residual melt water may leak out of the drainage system. It is also useful to have a multimeter on hand if you plan to immediately diagnose the electrical circuits of heaters and sensors.
Removing the internal elements of the freezer
The process of removing the back wall in refrigerators LG begins with the removal of all elements that physically block access to the fastening screws. The design may vary slightly depending on the model, but the general principle remains the same. Carefully inspect the interior space and find all the mounting points.
First of all, pay attention to the top of the camera. Often there is a lamp or control unit located there, which can interfere with the removal of the panel. Carefully pry up the plastic clips and remove the decorative elements. Do not use excessive force, as plastic becomes more fragile in the cold.
Pay special attention to the fastenings at the bottom of the freezer. There may be screws hidden under decorative plugs or rubber seals. On some models LG you need to remove the bottom drawer guide to gain access to the bottom rear panel bolts.
After removing all visible obstacles, check the perimeter again for hidden screws. Often one forgotten bolt can cause the plastic to break when trying to remove the panel. Make sure that all fasteners are unscrewed and put in a safe place so that they do not get lost.
Technology for removing the rear panel and access to components
When all the screws are unscrewed, the most critical stage begins. The back wall in refrigerators LG usually is held not only by bolts, but also by plastic latches around the perimeter. It is best to start dismantling from the bottom, carefully pulling the panel towards you.
Use a plastic spatula or card to help the latches disengage. Move from bottom to top, releasing each side one by one. Do not pull sharply; it is better to hear the characteristic click of a snap than to see a crack in the plastic. The panel may be glued to the seal, so care is required.
Once the panel has come away from the walls, do not pull it all the way towards you. There may be wires inside that lead to a fan, sensors, or a light bulb. A sudden movement can break these connections. Carefully move the panel a few centimeters and assess the situation.
☑️ Algorithm for removing the panel
If access to the connectors is limited, you may need to remove the top of the case or the air ducts. In models with the system Multi Air Flow air ducts can be mounted separately. Disconnect the connectors, if necessary, to completely remove the panel, having previously photographed their position.
Diagnostics of the defrost system and heating element
After removing the back wall, you will see an evaporator - a radiator entangled in tubes. This is where ice most often freezes if the defrost system does not work correctly. Visually assess the condition of the evaporator: is the ice uniform, is there any mechanical damage to the tubes.
The key element to check is Defrost heating element. In refrigerators LG it can be located at the bottom of the evaporator (open type) or hidden inside a plastic box (closed type). To check the integrity of the heater, you need to “ring” it with a multimeter in resistance measurement mode.
The normal resistance of a working heating element is usually from 200 to 400 Ohms. If the device shows one or infinity, it means that the heater has burned out and requires replacement. It is also worth checking the defrost sensor, which monitors the temperature of the evaporator and sends a signal to turn on the heating element.
⚠️ Attention: When diagnosing electrical circuits, make sure that the refrigerator is disconnected from the network. Make measurements only with the device de-energized to avoid electric shock or damage to the multimeter.
A common problem is that the drain hole through which water drains into the tray above the compressor is also clogged. If the tube is clogged with ice or dirt, the water does not drain and freezes at the bottom of the chamber, forming a huge ice dam. You can clean the channel using a soft wire or a syringe with warm water.
Table of main faults and symptoms
Understanding the symptoms helps to quickly determine the cause of the breakdown before disassembly begins. Below is a table that will help compare the visible signs of a malfunction with the probable causes in the refrigerator defrost system LG.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Ice only at the bottom of the chamber | Drainage clogged or heating element malfunction | Clean the drainage, check the heating element |
| Ice covers the entire evaporator | The defrost sensor or timer is faulty | Replace the sensor, check the circuit controls |
| The refrigerator hums, but does not freeze | The blower fan does not work | Check the fan and its power supply |
| Water on the floor under the refrigerator | Drain overflow tray | Check the tray and drainage tube |
It is important to understand that symptoms can overlap. For example, if the defrost sensor is faulty, ice may build up unevenly. A comprehensive check of all system elements No Frost gives the most accurate result.
If a visual inspection and testing of the elements did not reveal obvious breakdowns, the problem may lie in the control module. The electronics could freeze or fail without sending a signal to start the defrost cycle. In such cases, a more in-depth diagnosis with the participation of a specialist is required.
Assembly and testing after repair
After successfully replacing faulty parts or cleaning the drainage, it is necessary to correctly assemble the structure. Installation of the rear panel is carried out in the reverse order of dismantling. First, connect all the electrical connectors, making sure that the latches click.
Press the panel against the walls of the chamber and sequentially snap all the clips around the perimeter. Make sure that the panel fits tightly, without gaps through which cold air can escape. Only after this, screw all the fastening screws into place.
Do you need to wait before turning it on?
After assembly, it is not recommended to immediately plug in the refrigerator. Let it sit unplugged for 15-20 minutes to allow the refrigerant to settle and the condensation to dry. This will extend the life of the compressor.
Reinstall all shelves, drawers and decorative elements. Check the tightness of the doors. Now you can turn on the refrigerator. Pay attention to the operation of the fan: it should turn on some time after the compressor starts.
During the first 24 hours, check the operation of the unit. Make sure that no new ice forms on the walls and that the temperature in the freezer drops to the set values. If the problem was a blockage, the water should flow freely into the drain.
Prevention of re-formation of ice
To avoid a recurrence of the situation with ice freezing, it is important to follow the rules for operating the refrigerator LG. Do not load warm food into the chamber and try to minimize the time the door is open. A constant flow of moist air accelerates the formation of a snow coat.
Regularly check the condition of the rubber seals on the doors. If it is damaged or does not fit tightly, warm air will enter the chamber, which will lead to intensive formation of condensation and ice. If necessary, replace the seal.
It is also worth periodically checking whether the air ducts are blocked by products. Air circulation inside the chamber must be free. If food is placed close to the back wall, this may disrupt the operation of the temperature sensors and lead to an incorrect cooling cycle.
Frequently asked questions (FAQ)
Is it possible to remove the back wall without defrosting the refrigerator?
Technically, you can remove the panel, but this is highly not recommended. If there is ice inside, it may crumble and damage the plastic parts or the evaporator during removal. In addition, working with an electrical appliance in a humid environment is dangerous.
Why did the refrigerator begin to make more noise after assembly?
Most likely, the back panel is out of place and is touching the fan blades. Also check to see if any wires are caught in the fan rotation area. It is necessary to disassemble the camera again and eliminate the distortion.
How often do you need to change the defrost heating element in LG?
The heating element is a resource part, but it does not have a strict replacement period. It serves until the spiral burns out. On average, during normal use, this occurs after 7-10 years, but it can happen earlier due to power surges.
What to do if the rear panel screws are rusty and do not turn?
Do not use excessive force so as not to tear off the screw head. You can add a little penetrating lubricant (eg WD-40) and wait 10-15 minutes. Use a screwdriver with exactly the right slot to avoid damaging the fasteners.
Is it necessary to call a technician if ice appears again?
If after defrosting and cleaning the drainage, ice appears again within a week, then the cause has not been eliminated. Most likely, one of the sensors or the heating element is faulty. In this case, professional diagnostics and replacement of parts are required.