Increased noise, constant operation of the motor and puddles of water on the floor are not just minor household inconveniences, but alarming signals indicating clogging of the heat exchange system. Cooling system any household refrigerator, be it an old Soviet unit or a modern one LG InstaViewrequires periodic maintenance for efficient heat dissipation. If you ignore the accumulation of dust and dirt on external and internal elements, the compressor begins to work with overload, which inevitably leads to its expensive repair or complete replacement.
In this article we will analyze in detail the algorithm of actions necessary for safe and high-quality cleaning of all components of the refrigeration circuit. You will learn how to get to hidden elements, what tools you will need and why regular cleaning extends the life of equipment by 5–7 years. The most critical element, which requires cleaning in 90% of cases of overheating, is the condenser grille located on the back wall. The correct approach to the procedure will allow you to avoid calling a technician and save a significant amount of the family budget.
Before taking active steps, it is necessary to understand the physical principle of operation of the device so as not to harm fragile components. The refrigerator works on the principle of heat exchange: the refrigerant takes heat from the chambers and releases it to the environment through radiators. If these radiators are covered with a dense layer of dust or pet hair, heat transfer stops and the equipment goes into emergency mode. Let's look at the main symptoms that indicate that cleaning the cooling system is already overdue.
Diagnostics: when system cleaning is needed
The need for intervention can be determined not only by the appearance of the rear wall, but also by indirect signs in the operation of the unit. Often, owners notice a problem only when food begins to thaw or, conversely, freeze to the walls. Compressor overheating is the first and surest sign that heat exchange is impaired. If, when you touch the back or side panel (depending on the model), you feel not just heat, but a noticeably hot surface that burns your hand, then the system cannot cope with energy dissipation.
Another important indicator is the operating mode of the motor-compressor. In a working refrigerator with a working heat exchange system, the compressor turns on periodically, performing a cooling cycle, and then rests. If your Bosch or Atlant buzzes almost without interruption, making only short pauses, this indicates that it is trying to compensate for poor heat transfer with increased power. This mode of operation leads to rapid wear of mechanical parts and burnout of the windings.
⚠️ Attention: If you notice that the refrigerator has begun to consume significantly more electricity (this can be tracked by bills or smart sockets), in 80% of cases the reason lies precisely in contamination of the heat exchangers, which causes the motor to wear out.
Also It is worth paying attention to the formation of ice. In systems No Frost ice should not form in visible parts of the refrigerator or freezer compartment. The appearance of a “fur coat” on the back wall of the refrigerator compartment or icicles in the freezer often indicates that the drainage system or evaporator is hidden under a layer of dust and cannot function properly. In older models with a drip system, a sign may be constantly melting ice that does not have time to escape through the drainage hole.
Preparation for the procedure: tools and safety
High-quality cleaning of the cooling system is impossible without proper preparation of the workplace and a set of tools. The main rule that you need to remember before starting any work: complete disconnection from the power supply. Under no circumstances should you try to clean while the cord is plugged in, even if you are just wiping dust outside, as water or a damp cloth can cause a short circuit in the compressor's electrical circuit.
To work, you will need a basic DIY kit, which can be found in almost any apartment. It is not necessary to buy specialized equipment if we are talking about routine maintenance and not complex repairs involving disassembling the freon line. It is important to prepare soft brushes that will not scratch the thin aluminum lamellas of the radiators, and a container for collecting water.
☑️ Preparation for cleaning
The list of necessary tools and materials includes:
- 🧹 Vacuum cleaner with a narrow brush attachment to remove the bulk of dry dust.
- 🖌️ A soft paint brush or a special brush with long bristles for cleaning hard-to-reach places.
- 💧 Spray bottle with warm water or a weak soap solution for wet cleaning.
- 🧽 Microfiber or soft rags that do not leave lint.
- 🔦 A flashlight to inspect the condition of the radiator fins in the depths of the case.
If you are planning a deeper cleaning that involves removing the panels, you may need a Phillips screwdriver and possibly a wrench to remove the clamps. Clear out the space around the refrigerator in advance so that you have easy access to it from all sides. Remove carpets and rugs, as during operation a large amount of dust may spill out of the system or water may pour out of the drain.
Cleaning the external condenser (radiator)
The condenser is a black grille located on the back wall of most classic refrigerators. It is here that the main cooling process of the refrigerant occurs, and it is this element that suffers most from the accumulation of dust, which acts as a heat insulator. Before starting cleaning, make sure that the refrigerator is moved away from the wall at a comfortable distance, providing access to the back panel from all sides.
The cleaning process should begin with dry cleaning, so as not to turn dry dust into difficult-to-remove dirt. Use a vacuum cleaner with a soft brush, carefully moving along the intercostal space. The movements should be directed along the ribs (vertically or horizontally) so as not to bend the thin metal plates. If a vacuum cleaner is not enough, you can use a dry brush, sweeping the dust down onto a previously laid rag or paper.
⚠️ Attention: It is strictly forbidden to use sharp objects (knives, screwdrivers, knitting needles) to pick between the fins of the condenser. Damage to the tube will lead to freon leakage and expensive repairs, which are often not economically feasible.
After removing the bulk of the dust, you can begin wet processing. Soak a cloth in warm water with a little dish soap, wring it well, and wipe the grate. Do not pour water directly onto the condenser or electrical parts of the compressor! The moisture should remain only on the rag. For models with a closed casing above the compressor (often found in Indesit or Stinol), it is better to remove the casing, clean the insides and wipe the compressor itself, since dust on its housing also interferes with cooling.
Maintenance of the compressor and fan area
The compressor and fan (if provided by the design of your model, for example, in systems No Frost) are located in the lower part of the rear wall, often covered with a metal or plastic box. Removing this cover provides access to the most important components. Here, dust mixes with oil and forms a dense coating, which is extremely difficult to remove by dry cleaning.
The condenser cooling fan is a small but important element that is often forgotten to clean. The fan blades become covered with dust, causing the fan motor to overheat and the air flow to become weak. Gently wipe the blades with a damp cloth, holding them with your finger so as not to damage the balance. Check whether the fan shaft rotates freely by hand - if there is any jamming, the bearing may need to be lubricated or replaced.
The compressor itself also needs wiping. Despite the fact that it seems sealed, the layer of dust on its body acts as a “fur coat” that prevents heat from escaping into the atmosphere. Wipe the compressor housing, check the condition of the starting relay (black or white box on the side or top of the motor) - there should be no cobwebs or a dense layer of dirt on it, which can cause sparking.
| Element | Type of pollution | Cleaning method | Frequency |
|---|---|---|---|
| Condenser (grid) | Dry dust, wool | Vacuum cleaner, dry brush | Once every 6-12 months |
| Compressor | Dust, oil deposits | Wet rags | Once a year |
| Fan | Sticky dust on the blades | Wet cleaning | Once a year |
| Drainage tray | Mold, mucus | Rinsing with warm water | When an odor appears |
Cleaning the evaporator and drainage system (No Frost)
For owners of refrigerators with the No Frost system, the condition of the evaporator, which is hidden behind the back panel inside the freezer, is critically important. If you notice that the refrigerator is not freezing well, but the compressor is running constantly, the evaporator may be clogged with ice due to a clogged drainage hole or defrosting malfunction, although often the reason is simple - dirt.
To get to the evaporator, you need to defrost the refrigerator (completely, at least 24 hours), remove all the shelves and dismantle the back plastic panel in the freezer. An aluminum evaporator radiator will open in front of you. It needs to be carefully vacuumed if there is visible dust, but most often the problem lies in the drainage hole at the bottom under the evaporator. It may be clogged with crumbs, mold or ice.
To clear the drainage, use a soft wire (for example, copper) or a special brush, carefully pushing it into the hole. Then pour some warm water into it from a syringe or douche to make sure that the water flows freely into the drainage tray above the compressor. If the water is standing, continue cleaning. Also check the defrost heater (TEH) for carbon deposits or oxidation of the contacts.
What to do if the drainage is frozen?
If the water does not drain due to an ice plug, do not try to pick it out with a knife. Pour some warm (not boiling water!) water into the hole and wait. Using boiling water can lead to cracks in the plastic drainage groove.