A modern refrigerator is a complex unit, the heart of which is compressorresponsible for the circulation of the refrigerant. It is this unit that creates the necessary pressure to cool the products in the chambers. However, during long-term use or after transportation, it may be necessary to re-fix it or completely replace it. Incorrect installation can result in increased noise levels, vibration, and even rupture of tubes.
Attaching a compressor is not just screwing bolts to the frame, but a precise technical process that requires adherence to a sequence of actions. Errors at this stage can lead to damage shock absorbers or displacement of the entire unit. It is important to understand that each refrigerator model, be it Indesit, Atlant or Bosch, has its own design features for the location of supports.
In this article we will analyze in detail the algorithm for installing the motor, consider the types of fastenings and pay special attention to safety precautions. You will learn what tools you will need for the job and how to avoid common mistakes that beginners make. Correct fixation will ensure quiet operation of the equipment for many years.
Necessary tools and preparation of the workplace
Before you begin physical interaction with the technical unit, it is necessary to prepare the appropriate equipment. For high-quality fixation, you will need a standard set of locksmith tools. The lack of the necessary equipment can lead to thread breakage or damage to the case.
First of all, get a set of open-end and box-end wrenches, since the nuts on the mounting studs may differ in size. Also an indispensable assistant will be screwdriver or a powerful Phillips screwdriver for working with frame screws. To work in hard-to-reach places on the back wall, pliers are often required.
Pay special attention to preparing the surface on which the refrigerator will lie. The floor must be level and clean so that the unit does not wobble during your manipulations. Do not forget about personal protective equipment, such as gloves, which will protect your hands from sharp metal edges.
Below is a list of basic equipment that should be on hand:
- 🔧 A set of wrenches (from 8 to 14 mm) for tightening nuts on studs.
- 🪛 Phillips and slotted screwdrivers of various sizes for dismantling the casing.
- 🔦 A powerful flashlight or portable lamp to illuminate the lower part of the unit.
- 🧤 Work gloves with a rubberized coating for a secure grip.
⚠️ Attention: It is strictly forbidden to start work without disconnecting the refrigerator from electrical network. Even briefly touching live parts can cause serious injury.
Removing the protective casing and accessing the compressor
To gain access to the motor, you must remove the back panel of the refrigerator. This process is usually not difficult, but requires care so as not to damage the plastic elements or paintwork. The panel is attached to several screws located around the perimeter.
After removing the cover, you will have a view of the compressor compartment. Not only the sensor itself is located here, but also a capacitor array, as well as a starting relay. Inspect the space carefully: sometimes access to the mounting bolts may be limited by wires or copper pipes. motor-compressor, but also a capacitor array, as well as a starting relay. Inspect the space carefully: Sometimes access to mounting bolts may be limited by wires or copper tubing.
If your refrigerator is equipped with a system No Frost, there may be an additional fan at the bottom, which also requires careful handling. Before starting active actions, it is recommended to photograph the initial position of all elements. This will help with reassembly.
Do you need to drain the freon?
Draining the freon is only required if you plan to disconnect the copper tubes or completely change the compressor. If we are only talking about tightening or replacing rubber shock absorbers without compromising the tightness of the system, there is no need to drain the refrigerant.
It is important to ensure good lighting of the work area, since fasteners are often covered with a layer of dust and technical grease, which makes visual inspection difficult. Use a brush to clean the surface of dirt before unscrewing.
Types of compressor mounts in modern refrigerators
The design of the motor mount can vary significantly depending on the manufacturer and year of manufacture of the model. Understanding the type of fastener you have is essential to selecting the correct parts and installation method. There are mainly two types of fixation: screw and shock-absorbing.
The first type is a rigid mount, where the compressor is pressed to the frame with metal plates and bolts. This method was often used in older refrigerator models Zil or Biryusa. The second type is a more modern one, where the motor is suspended on springs or rubber bushings, which helps dampen vibrations.
The table below compares the main characteristics of different types of mounts:
| Mounting type | Element material | Noise level | Difficulty of replacement |
|---|---|---|---|
| Screw (hard) | Steel, rubber gaskets | High | Low |
| Spring (suspended) | Metal springs | Medium | Medium |
| Rubber (shock absorption) | Rubber bushings, studs | Low | High |
Modern models, such as LG or Samsungmost often use combined systems with rubber-metal bushings. This allows for maximum quiet operation. However, over time, the rubber loses its elasticity and requires replacement along with the mounting studs.
Step-by-step instructions: how to install the compressor correctly
The installation process begins with positioning the unit itself on the frame seat. The compressor must lie strictly horizontally; distortions are unacceptable, as they can lead to jamming of the internal mechanisms of the motor. Carefully lower the device onto the studs or into the mounting holes.
Next you need to install shock-absorbing pads. If you use new rubber bushings, make sure they fit snugly in place. Do not use excessive force during installation to avoid tearing the rubber. In some cases, it may be necessary to lubricate the inner surface of the bushing with silicone grease to facilitate installation.
Then you should tighten the mounting nuts or insert the fixing pins. At this stage, tightening is done by hand, without the use of tools. This is necessary so that the compressor itself “finds” its optimal position and stands up without tension.
☑️ Installation checklist
The final tightening is carried out with a wrench diagonally. First, tighten one nut a little, then the opposite one, and so on, until all fasteners are secured with the required force. Over-tightening may deform the compressor housing or crush rubber elements.
⚠️ Attention: Keep an eye on the copper tubing during installation. They should not touch the compressor housing or sharp edges of the frame, otherwise vibration wear and freon leakage are possible.
Elimination of vibration and extraneous noise after installation
After the compressor is secured, it is necessary to carry out initial diagnostics. Turn on the refrigerator and listen to the motor running. Light vibration in the first minutes of operation is acceptable, but it should not be transmitted to the refrigerator body or accompanied by knocking.
If you hear a metallic clang or feel strong trembling, check the gaps between the compressor and the walls of the compartment. Sometimes even millimeter contact causes resonance. To fix the problem, you can carefully bend the metal plate or place an additional piece of vibration-isolating material.
Themselves can also be a source of noise fasteners. If the nuts are not tightened evenly, misalignment occurs, which increases vibration. Loosen the fasteners and repeat the tightening procedure, observing the principle of uniformity.
In some cases, vibration occurs because the condenser tubes are in contact with each other. Carefully, using your hands (without tools, so as not to squeeze), spread them to a distance of 1-2 centimeters. This simple action often eliminates the ringing.
Typical errors during fastening and their consequences
One of the most common mistakes is ignoring the condition of the rubber elements. Installing an old compressor on new studs with old, fossilized bushings will not work. Rubber must be elastic, otherwise it turns into hard plastic and transfers all vibrations to the frame.
Another mistake is the use of inappropriate fasteners. Using bolts that are too long may cause them to push against the motor housing or damage internal partitions. Always use original spare parts or their high-quality analogues that meet the specifications of your model.
Often technicians forget to check the reliability of the start relay. After installing the compressor, the relay should sit tightly on the contacts. If it dangles, sparking, overheating and failure of the unit may occur.
Do not forget about cleanliness in the compartment. Left tools, insulation scraps or debris can get into moving parts or heated surfaces, which will lead to an unpleasant odor or even a fire.
Tightness check and test run of the system
The final stage is a comprehensive check of the system's performance. After installing the compressor and connecting the electricity, the refrigerator should start working. Pay attention to the nature of the start: the motor should turn on smoothly, without sudden jerks or buzzing.
During the first 30-40 minutes of operation, monitor the temperature of the compressor housing. It should heat up evenly. If one part is hot and the other cold, or if heating occurs too quickly, this may indicate problems with the lubrication system or electrical system.
Be sure to check the pipe connections (if repairs were made with depressurization) for leaks. A soapy solution will help identify even microscopic air bubbles escaping from the system. The absence of bubbles is a good sign.
⚠️ Attention: If after starting the refrigerator runs but does not cool, or the compressor turns off after a few seconds (the relay clicks), immediately unplug the device. These are signs of a malfunction in the electrical circuit or compressor wedge.
Make sure that the protective cover is in place and securely fastened. It protects internal components from dust and moisture, and also reduces noise levels. Do not leave the unit operating without the rear panel for a long time.
Can the compressor be secured with sealant or glue?
The use of glue or sealant to fix the compressor is strictly prohibited. These materials do not have the necessary strength and elasticity to withstand constant vibration and weight of the unit. In addition, the chemical components of the glue can destroy the rubber parts or the insulation of the wires.
What to do if the fastening stud breaks?
If the stud breaks off at the base, it must be drilled out and a new thread cut or a repair sleeve used. It is difficult to simply weld it because of the risk of damaging the thin metal of the frame. It is better to order an original set of fasteners for your refrigerator model.
Is it necessary to change the oil in the compressor during installation?
When replacing fasteners or shock absorbers normally, there is no need to change the oil, since the system remains sealed. An oil change is required only during a major overhaul, when the refrigerant circuit is opened or if the compressor has been working with open pipes for a long time.
Why does the compressor heat up after replacing the fasteners?
Increased heating can be caused by overtightening of the fasteners, which creates excess stress in the housing, or by an incorrect angle of inclination of the refrigerator during installation. Also, the cause may be airing of the system if the circuit was broken during work.