Searching compressor in the refrigerator is the first place where any serious diagnosis or attempt to repair household appliances begins. Most owners are faced with the need to find this unit when there is extraneous noise, problems with cooling, or when planning to defrost the No Frost system. Understanding where exactly the heart of the refrigeration unit is located allows you to quickly assess the situation and make a decision to call a technician or fix the problem yourself.
In the vast majority of modern and old models, this electromechanical unit is hidden from the user's eyes. Manufacturers hide it in the lower rear part of the case, covering it with a special metal or plastic cover. This is done for a reason: compressor works under high pressure, gets very hot and requires protection from accidental mechanical damage, as well as from contact with water during cleaning.
However, there are exceptions and design features depending on the brand and type refrigerator. For example, in some built-in models or devices with a ventilation system around the entire perimeter, access to the motor may be difficult. In addition, knowledge of the location helps to correctly organize the space around the equipment, providing the necessary heat sink for stable operation.
Standard location of the compressor in classic models
If you are the owner of a classic two-chamber refrigerator, then with a 99% probability compressor located at the bottom of the back wall of the device. To see it, you need to move the refrigerator away from the wall and look into the lower niche. There you will find a black metal cylinder or barrel from which copper tubes and electrical wires extend. It is this element that is responsible for the refrigerant circulation system.
Often this unit is covered with a casing, which can be made of thin steel or durable plastic. The casing performs the function of protecting and directing air flow to cool the motor. In some models, especially Soviet-made or budget series, the casing may be missing and unit visible immediately. It is important not to confuse the compressor with the condenser (the grille at the back), although they are related.
Access to the motor is often required to replace start relay or check contacts. If you plan to carry out the manipulations yourself, make sure that the device is completely disconnected from the power supply. The voltage in the network is dangerous to life, and capacitors can retain a charge even after being turned off.
⚠️ Attention: Never try to remove the protective cover or compressor casing while the refrigerator is plugged in. It is also strictly forbidden to touch copper tubes if you are not sure of their temperature - they can be hot or, conversely, scalding cold depending on the operating cycle.
Features of placement in No Frost refrigerators
In devices with a system No Frost (or Full No Frost) location The compressor remains traditional - at the bottom at the back, but the design of the surrounding space may differ. It is important to understand here that such models often use a more powerful motor, since it needs to ensure the operation of not only the refrigeration chamber, but also the freezer through a single cooling system. Compressor in such units it can work more intensely, which requires improved ventilation.
Sometimes in No Frost models, manufacturers install additional sound insulation around the engine compartment. This may be a layer of foam material or an additional plastic box. When searching engine in such refrigerators, you may need to carefully bend or remove this insulating layer. Be careful not to damage the thermal insulation materials, as this will lead to loss of cold and increased energy consumption.
Also in No Frost systems, a condensate collection tray is often located next to the compressor. Water from the evaporator flows through the tube directly onto the hot surface of the running motor and evaporates. This is a normal situation, but it means that the area around the compressor compressor
Non-standard locations: built-in and two-compressor equipment
The situation becomes more complicated when we are talking about built-in equipment or models with two cooling circuits. In two-compressor refrigerators (where the temperature in the refrigerator and freezer compartments is separately controlled) you will find two motors. They are usually located next to each other in the same niche below, but can be separated by a partition. Each of them is responsible for its own two-compressor cooling circuit. In built-in refrigerators, access to the rear wall is often limited by the kitchen unit. The compressor is located in the same place - below, but to get to it, you may need to remove the decorative base of the kitchen or pull the refrigerator out of the niche. In some premium models, the motor compartment may be placed in a separate block or have a side position, but this is the exception rather than the rule. cooling circuit.
In built-in refrigerators, access to the rear wall is often limited to the kitchen unit. The compressor is located in the same place - below, but to get to it, you may need to remove the decorative base of the kitchen or pull the refrigerator out of the niche. In some premium models, the engine compartment may be located in a separate block or have a side position, but this is the exception rather than the rule.
It is also worth mentioning linear inverter compressors, which are often installed in LG refrigerators and some Samsung models. Externally, they differ from the classic “barrels” and can resemble an oblong cylinder with a flat end. Their location is standard, but the operating principle and fastening are different. Inverter motor It works quieter and smoother, but its diagnostics require special equipment.
| Refrigerator type | Compressor location | Access features | Number of motors |
|---|---|---|---|
| Classic (Drop) | Bottom, rear, center | Open or under a light casing | 1 (usually) |
| No Frost | Bottom, rear | Often covered with sound insulation | 1 or 2 |
| Built-in | Bottom, rear | Dismantling of the kitchen plinth is required | 1 or 2 |
| Side-by-Side | Bottom, rear (sometimes at the base) | Removal of the rear panel may be required | 1 or 2 |
How to determine location by sound and vibration
If visual inspection is difficult, you can use your hearing. Compressor - the loudest working element in the refrigerator. Turn on the device and listen: a characteristic hum and periodic clicks will come from the lower rear part of the case. A hand placed on the back wall below will feel a clear vibration motor running.
However, you should be careful: in No Frost refrigerators the fan can also make noise. Its sound is higher and shrill, in contrast to the low hum piston compressor. The fan is usually located in the freezer compartment (behind the back wall inside) or in the lower part outside, next to the motor. In order not to confuse the sources of sound, you can momentarily open the door of the refrigerator - in many models, when you open the door, the fan stops, but the hum of the compressor remains.
If you hear knocking, clanging or an excessively loud hum, this may indicate a malfunction. Bearing wear, problems with valve group or improper installation of the refrigerator (misalignment) can increase vibration and noise. In this case, knowing the exact location of the motor will help to carry out initial diagnostics.
Why does the compressor knock?
The knocking can occur due to wear of internal parts, loosening of the mounting bolts, or pipes falling on top of each other. If the knocking appears abruptly, it is better to turn off the device.
Design of the compressor compartment and main elements
Looking into the compartment where it is located compressor, you will see not only the motor itself. There is a whole system of elements that ensure its operation. These include high and low pressure copper tubing, which may feel hot or warm to the touch. There is also filter drier a small cylinder built into the gap in the copper line, which cleans freon from moisture.
An important element is the start-up relay. It is attached directly to the compressor housing and is responsible for starting the engine and protecting against overloads. It is the relay that often causes the refrigerator to hum but not turn on, or turn on for a few seconds and turn off. Replacing this element is one of the most common procedures repairthat you can do yourself if you have the skills.
Also in the lower part there is a capacitor (black grille), which can surround the case or be located on the back wall. It dissipates heat. In some modern models with a hidden condenser, heat is removed through the side walls, so there may simply be a smooth sheet of metal at the back, but there may be no grille. Diagnostics of the compressor compartment data-i="140">Disconnect the refrigerator from the mains lattice absent.
☑️ Diagnostics of the compressor compartment
Safety precautions during inspection and maintenance
Before touching any parts in the compressor area, strict safety rules must be followed. The main one is complete disconnection from electrical networks. Even if you just want to lubricate the hinges or check the fastening, the risk of electric shock if the insulation of the wires at the bottom of the refrigerator is damaged is very high due to possible moisture.
The second important aspect is temperature. As already mentioned, the tubes and the housing itself of a running (or just turned off) compressor can be very hot (up to 80-90 degrees Celsius). You can get burned instantly. Allow the equipment to cool for 15-20 minutes after turning it off before starting any work.
The third point is the fragility of copper tubes. They are thin-walled and easily pinched or burst with careless movement. Damage to the circuit will lead to leakage refrigerant, which will require expensive professional repairs with soldering and refilling. Do not use sharp tools near copper lines.
⚠️ Attention: If you notice oily stains around the compressor or on the floor underneath it, this may indicate a freon leak along with the oil. In this case, you cannot operate the refrigerator, as this will lead to the motor burning out. A call from a technician is required.
Frequently asked questions about the location and design of the compressor
Can the compressor be located on top or on the side of the refrigerator?
In the vast majority of household models, the compressor is located only at the bottom at the back. However, in some industrial refrigerated display cases or very old models (from the times of the USSR), the unit was located at the top. This practically never occurs in modern household refrigerators.
Why does the compressor get very hot?
Heating to 60-90 degrees is the norm for a working compressor, since it compresses the gas, which is accompanied by the release of heat. The only danger is excessive heating, when it is impossible to touch the motor with your hand, or a situation when it is hot, but the refrigerator does not freeze.
How to understand that the compressor has burned out?
Main signs: the refrigerator does not turn on, a relay click is heard and silence, or the motor hums for a couple of seconds and turns off. It can also knock out the automatic switch (plugs) in the apartment when you try to turn it on.
Does the compressor need to be lubricated?
No, the compressor is a sealed unit, inside of which there is already a special oil. Lubricating the external moving parts (if they are in the mount) is usually not required, and climbing inside the sealed case on your own is strictly prohibited.