Bloating or damage to the internal rear panel refrigeration chamber is not just a cosmetic defect, but a signal of serious problems with thermal insulation and the tightness of the circuit. When the back wall becomes deformed, air circulation is disrupted, and moisture can penetrate into the resulting cavities, causing corrosion and mold. Owners often notice this problem too late, when the refrigerator begins to keep cold worse or consume more electricity.
Repairing this part requires care and understanding of the design of your unit, be it Indesit, LG or Atlant. The process of restoring the integrity of the wall includes dismantling the old layers, drying the insulation and installing a new panel. It is important to understand that simply gluing the plastic back is not enough - it is necessary to eliminate the cause of the swelling, which is most often accumulated moisture or a violation of the factory assembly technology.
Before taking active action, it is necessary to assess the scale of the disaster. If the swelling is small and does not affect the evaporator, you can correct the situation yourself. However, if the system is damaged No Frost or traces of refrigerant are visible, it is better not to risk it and turn to professionals. In this article we will analyze the standard algorithm for replacing the internal panel, which is suitable for most household models.
Diagnostics of damage and causes of swelling
The first step is to accurately determine the nature of the damage. Most often, the back wall swells due to the fact that polyurethane foamused as insulation absorbed moisture and expanded. This happens if the sealed circuit has been broken or if the refrigerator has been operated for a long time with the door open. In rare cases, the cause is a manufacturing defect when the insulating material was unevenly distributed.
Carefully inspect the surface of the plastic. If microcracks are visible on it or it has peeled off at the edges, this indicates a loss of elasticity of the material. Plastic becomes brittle over time, especially when exposed to low temperatures and defrost cycles. Models with the system Low Frost are characterized by the formation of an ice crust under the plastic, which pushes the panel out.
⚠️ Attention: If, when pressing on the bulge, you hear a characteristic crunch of ice or feel the release of cold air, it means that the tightness of the evaporator is broken. In this case, repairing the wall is impossible without refilling the system with freon.
It is also worth checking the condition of the door seals. If the rubber does not fit tightly, warm air constantly gets inside, condenses on the back wall and freezes. This creates excess pressure in the insulating layer. Eliminating the root cause is a prerequisite for successful repair, otherwise the new panel will swell again in a short time.
Necessary tools and materials
To perform the work efficiently, you will need to prepare a specific set of tools. You should not try to replace the panel using only household glue and a knife - the result will not be durable. You will need reliable fasteners and materials that are resistant to low temperatures and humidity.
- 🔧 Screwdrivers of various types (phillips and flat) for dismantling shelves and fastenings.
- 🔪 Construction knife or scalpel for carefully removing old sealant.
- 🌡️ Construction hair dryer (use with caution) to soften hardened glue.
- 🧴 Degreaser and antiseptic for surface treatment before installation.
Particular attention should be paid to the choice of new plastic. The ideal option is to use original spare parts for your model, for example, for Bosch or Samsung. If the original cannot be found, you can use sheet ABS plastic 2-3 mm thick, which has sufficient strength and frost resistance. Ordinary polystyrene can crack at the first serious cooling.
It is recommended to use specialized adhesives for refrigeration equipment as an adhesive. They retain elasticity at temperatures down to -40°C. The use of mounting foam to fix the panel is prohibited, since when it expands it can again deform the thin plastic.
Preparation for dismantling the old panel
You need to start working by completely disconnecting the refrigerator from the power supply. This is a basic safety rule that cannot be ignored. While the unit is defrosting (this will take at least 24 hours), you can prepare your work area and tools. All shelves, drawers and guides from the refrigerator compartment must be removed.
After defrosting, remove all elements that interfere with access to the rear wall. In some models, you will need to remove the lampshade and thermostat. Be careful with wiring: even when switched off, capacitors can retain a charge, although the risk is minimal. Carefully disconnect the terminals if temperature sensors are built into the panel.
☑️ Preparation for repair
If the back wall is held on by latches, they must be carefully pressed out with a plastic card or a flat screwdriver wrapped in a cloth so as not to scratch the case. Metal tools may damage the integrity of the camera's enamel coating. Models Electrolux and Whirlpool often use hidden screws under decorative plugs.
It is important to ensure good lighting of the work area. Any crack or remnant of old adhesive can become a stress point that will lead to further failure. Carefully inspect the perimeter of the panel fastening.
Inner wall replacement technology
The process of installing a new panel requires precision and patience. First, you need to completely clean the ends of the chamber from any remnants of old sealant and glue. The surface must be perfectly smooth and free of grease. Use isopropyl alcohol or a special cleaner for plastic.
The new panel is tried on without glue, checking that all holes for air ducts and fasteners match. If sheet plastic is used, it often has to be shaped into place by heating it with a hairdryer to a temperature of 60-70 degrees. This allows the material to take the desired shape without creasing. Do not overheat the plastic, otherwise it will lose its strength properties.
| Work stage | Materials | Drying time | Temperature conditions |
|---|---|---|---|
| Cleaning surface | Degreaser, rags | 10 minutes | Room |
| Applying glue | Cold adhesive | 5-10 minutes (shutter speed) | Room |
| Fixing the panel | Spreaders, weight | 12-24 hours | Indoor |
| Sealing of seams | Food-grade silicone | 24 hours | Indoor |
Glue is applied in an even layer on the ends of the chamber and the back side of the panel. After connecting the parts, they must be fixed. To do this, you can use soft spacers or sandbags, which will evenly press the plastic over the entire area. It is important to avoid the formation of air bubbles between the wall and the insulation.
Restoration of thermal insulation and sealing
One of the main problems during repairs is the restoration of thermal insulation layer. If the old polyurethane foam is damp, it will need to be removed and replaced. However, at home it is difficult to re-foam the entire volume, so the dry layer method is most often used.
Between the new plastic panel and the metal body, you can lay a layer of foil penofol 3-5 mm thick. This material perfectly reflects heat and does not absorb moisture. It can be easily cut to size and glued to the inside of the new wall before installation.
⚠️ Warning: Never use regular high expansion foam inside the refrigerator compartment. When it hardens, it can squeeze out a thin plastic panel and ruin the whole job.
After installing the panel, all joints around the perimeter must be sealed with food-grade silicone sealant. It will prevent moisture from entering the insulation in the future. The seam must be continuous and even. Excess sealant is removed immediately before it hardens.
For models with the system Total No Frost it is critical to restore the air circulation channels. Make sure that the air intake and supply openings are not blocked by glue or a new layer of insulation. Violation of aerodynamics will lead to improper operation of the refrigerator.
Assembling and testing equipment
After the glue and sealant have completely dried (the polymerization process takes at least a day), you can begin assembly. Reinstall the temperature sensors, lighting lamps and thermostat. Check the reliability of the connections.
Return all shelves and drawers to their place. Now the refrigerator can be plugged in. The first start should be in idle mode, without products. This will allow the unit to reach operating temperature conditions and check the tightness of the new structure.
During the first 6-8 hours of operation, carefully monitor the new rear wall. There should be no condensation, frost or swelling on it. If you notice that the panel begins to deform again, it means that the process of expansion of the insulation has not been stopped, and deeper intervention is required.
What to do if an unpleasant odor appears after the repair?
If after installing a new panel the smell of glue or plastic appears, ventilate the refrigerator compartment for 24 hours with the door open. Use activated charcoal to absorb residual odors. If the smell does not go away, it is possible that a low-quality sealant was used that is not intended for food chambers.
Frequently asked questions (FAQ)
Is it possible to use ordinary silicone sealant for repairs?
It is not recommended to use ordinary construction silicate sealant, as it can contain fungicides and substances unsafe for contact with food. Moreover, it can become brittle at low temperatures. Use only sanitary silicone labeled “food grade” or specialized compounds for refrigerators.
How long should a new panel dry before turning it on?
The minimum drying time for glue and sealant is 12 hours, but for complete polymerization and strength gain, it is better to wait 24 hours. Turning on the refrigerator earlier than this period can lead to displacement of the panel under the influence of thermal expansion of materials.
Why did the wall swell in a new refrigerator?
Swelling in a new refrigerator most often indicates a manufacturing defect associated with a violation of the insulation foaming technology or moisture ingress at the production stage. Also, the reason may be transportation in a horizontal position without observing the time intervals before switching on.
Is it necessary to remove the compressor to replace the rear wall?
No, to replace the internal plastic panel of the refrigerator or freezer, you do not need to remove the compressor or open the freon circuit. Work is carried out only inside the chamber and does not affect the technical compartment if the evaporator is not damaged.