Sooner or later, every owner of household appliances is faced with the need to look “under the hood” of their unit. Whether it is replacing a motor-compressor, eliminating a freon leak, or simply cleaning the heat exchanger from dust, access to internal components often requires dismantling external panels. Improper disassembly can lead to damage to the insulating layer, deformation of the case, or even a violation of the tightness of the system, so it is important to understand the design of your refrigerator.
Modern models, be it LG, Bosch or Atlanthave their own design features, but the general principle of the layout remains similar. In this article we will analyze in detail the process of removing walls, paying attention to the nuances of working with various materials and types of fasteners. You will learn what tools you will need and how to avoid typical mistakes that beginners make when first getting acquainted with the internal structure of a refrigerator.
Before you pick up a screwdriver, you need to clearly understand what exactly you are going to do. Disassembly is not just removing bolts, it is a sequential process that requires attention to detail. Safety should be priority number one, as there may be live or pressurized parts inside.
Preparation of the workplace and necessary tools
Quality preparation is half the success of any repair operation. First, make sure you have some free space around the unit. You need to move refrigerator from the wall at least 1-1.5 meters to be able to walk around it on all sides. It is better to cover the floor with soft material, for example, cardboard or an old blanket, so as not to scratch the coating during work.
The set of tools should be selected in advance so as not to be interrupted at the most crucial moment. You will need:
- 🔧 A set of screwdrivers (Phillips and flathead of different sizes) for unscrewing screws.
- 🔩 Wrenches or heads (often sizes 8, 10 mm) for fastening bolts.
- 🔪 A stationery knife or a thin spatula for carefully prying off the plugs.
- 🧤 Work gloves to protect hands from sharp metal edges.
Particular attention should be paid to lighting. Refrigerator interiors are often dark, and without a good lamp, you may miss hidden fasteners or damage wiring. If you are working in a garage or workshop, use a portable light source with a bright LED.
⚠️ Attention: Before starting any disassembly work, be sure to unplug the refrigerator! Unplug the plug from the socket and wait 10-15 minutes for the capacitors in the control electronics to discharge.
☑️ Preparation for disassembly
Removing the rear metal panel
The rear wall is the main access to the compressor-condensing unit. In most models, it is a sheet of thin metal fixed around the perimeter. Fastening can be carried out using self-tapping screws, bolts or special latches. In older models, there is often a combination of bolts and an adhesive layer, which greatly complicates the process.
Start with a visual inspection of the perimeter of the panel. Often the heads of fasteners are hidden under decorative plugs or plastic covers. Gently pry them off with a flathead screwdriver. If you see rust on the bolt heads, pre-treat them with a penetrating lubricant (such as WD-40) and let sit for 10-15 minutes. This will help avoid licking off the edges and breaking the fasteners.
After removing all visible fasteners, do not rush to pull the panel. It can “stick” to the body or adhere to the remnants of the factory sealant. Lightly tap the edges with the palm of your hand or a rubber mallet to break up the adhesion. Then, grasping the lower ventilation holes (they are usually stronger), smoothly pull the panel towards you and up.
It is important to understand what is behind the back panel located condenser is a lattice heat exchanger, which is very easy to damage. Do not lean on it and be careful with tools to avoid puncturing the tubes. Even a microscopic hole will cause a refrigerant leak and costly repairs.
Removing the side and top covers
Access to the side walls may be required to replace the evaporator, sensors or wiring. The design of the sidewalls depends on the type of refrigerator: in budget models it is simply a metal casing, in more expensive ones it is complex sandwich panels with integrated insulation. The top cover often hides the control unit or the top door hinge.
Removing the side panel usually requires removing the top cover, since it often “covers” the sides from above, fixing them. Locate the fasteners at the ends of the top panel. In some models Indesit or Ariston they may be hidden under rubber feet or a decorative strip on the front. After removing the top, the sides are usually moved back or moved to the side.
Pay attention to the presence of additional elements that may interfere with removal:
- 📦 Control unit (can be attached to the inside of the wall).
- 🔌 Electrical wiring harnesses (require careful disconnection or outlets).
- 🧊 Refrigerant pipes (running along the walls require caution).
When working with the side walls, it is important not to deform them. Thin metal wrinkles easily, and it will be difficult to restore the original geometry. If the panel is tight, check to see if you forgot to unscrew some hidden screw at the bottom, near the compressor.
⚠️ Attention: Do not use foam or rigid sealants to reassemble the panels. Factory assembly often uses special glue or mechanical fasteners that allow the walls to “breathe” and compensate for thermal expansion.
Working with internal insulation (PPU)
Between the outer metal case and the inner plastic box of the refrigerator there is a layer of polyurethane foam (PPU). This is the main heat insulator. During deep disassembly, for example, to search for a hidden freon leak in a foamed part, this material often has to be removed. This is a dirty and labor-intensive job that requires patience.
PPU is a hard but brittle substance. To remove it, chisels, hacksaws and special scrapers are used. The process is reminiscent of an archaeological excavation: layer by layer, you remove the foam, being careful not to damage the internal tubes and the plastic chamber itself. It is important to work slowly, as the tubes can pass close to the plastic.
The table below shows the main characteristics of the materials you will encounter:
| Material | Properties | Tool for work | Risks |
|---|---|---|---|
| Steel (body) | Thin, flexible, painted | Screwdriver, keys | Deformation, scratches |
| ABS plastic (internal chamber) | Brittle in the cold, melts | Knife, spatula | Cracks, punctures |
| PPU (insulation) | Hard, crumbles, sticky | Chisel, hacksaw | Damage to tubes |
| Copper/Aluminum (tubes) | Soft metal, easy bends | Soldering iron, rollers | Depressurization |
If your goal is just to get to the compressor, there is no need to touch the insulation. But if repairs are required evaporatorhidden in the wall, you cannot do without destroying the polyurethane foam. After the repair is completed, the cavity will need to be filled with new low-expansion foam so as not to squeeze out the inner chamber.
How to replace factory foam?
To restore insulation, use professional two-component foam for refrigerators. It has less expansion and better thermal insulation properties than a regular household cylinder with a straw.
Access to the No Frost system and evaporator
In refrigerators with the system No Frost the evaporator is hidden behind a plastic panel inside the freezer or refrigerator compartment. To remove this panel, it is often not necessary to disassemble the entire case from the outside, but sometimes access to the panel fasteners is located at the rear.
First you need to free the chamber from products and shelves. Next, locate where the rear plastic panel attaches to the inside. These can be self-tapping screws hidden under plugs or plastic latches. Proceed with caution: plastic becomes very brittle in the cold. If the refrigerator has just been running, give it time to warm up, or work very delicately.
The main elements that you will see behind the panel:
- ❄️ Aluminum evaporator (radiator).
- 🌀 Circulation fan air.
- 💡 Defrost heating element (heating element).
- 🌡️ Temperature and defrost sensors.
Often the cause of failure is this particular unit: ice freezing, burning of the heating element or fan failure. When removing the panel, you may need to disconnect the wiring connectors. Be sure to photograph or sketch the connection diagram so as not to mix up the contacts during assembly.
Assembly and sealing: putting everything back in place
The assembly process is a mirror image of disassembly, but has its critical moments. The most important thing is to ensure that all panels fit snugly. If there are gaps between the metal case and the insulation, this will lead to condensation (“dew”) forming on the outer walls of the refrigerator.
When installing the back panel, make sure that no wires or tubes are caught between the metal and the case frame. This is a common mistake that can lead to chafing of the wire insulation and a short circuit or pinching of the copper tube and blockage of the system.
The fasteners should be screwed crosswise, gradually tightening them. This will ensure that the panel fits evenly without distortion. If you replaced the insulation (PPU), wait until the new foam has completely dried before installing the external panels - this usually takes from 2 to 4 hours depending on humidity and temperature.
⚠️ Attention: After assembling and plugging in the refrigerator, pay close attention to the back wall for the first 30-40 minutes. There should be no sparkling, burning smell or unusual humming, which may indicate vibration of a poorly secured panel.
Common mistakes during self-disassembly
Inexperienced craftsmen often make mistakes that turn a simple repair into a disaster. One of the most common is the use of excessive force. If the part cannot be removed, it means that you did not find all the fasteners or did not take into account the design nuance. A jerk can break the plastic clips, which will then have to be restored using glue or replacing the assembly.
Another mistake is ignoring the markings of the wires. When disconnecting fan or sensor connectors, many people forget to mark which wire went where. As a result, during assembly you have to guess or look for electrical diagrams for a specific model Samsung or Whirlpool, which significantly delays the process.
It is also worth mentioning the erroneous opinion that all refrigerators are designed the same. The design can differ radically even within the same brand. Always look for technical documentation or a service manual for your specific model before starting work.
Is it possible to disassemble a refrigerator without damaging the insulation?
It is almost impossible to completely avoid damage to the insulation during deep disassembly (for example, to replace a foamed evaporator). However, during a standard compressor repair or thermostat replacement, the integrity of the PPU can be maintained if you act carefully and use the right tool.
What to do if the plastic latch breaks when removing the panel?
If the plastic latch breaks off, do not panic. You can replace it with universal fasteners or carefully drill a hole and use a self-tapping screw with a wide head. The main thing is to ensure a tight fit of the panel so that it does not vibrate.
Is it necessary to release freon before disassembling the walls?
No, you only need to release freon if you plan to solder pipes or change sealed components of the system. To dismantle the outer walls, remove the compressor (without disconnecting the tubes) or work with the electrician, it is not necessary to bleed off the refrigerant.
How to understand that the wall of the refrigerator is “crying”?
If after assembly you notice drops of water on the outer surface of the metal case, it means that the thermal insulation circuit is broken. Most likely, the panel does not fit tightly or the polyurethane foam layer is damaged, which is why a “dew point” appears inside the metal.