The cost is for informational purposes and consists of the price of the compressor, the cost of consumables and work, in the case of air conditioners, the work of dismantling and installing the outdoor unit is added.
The main criteria on which the price depends are the cost of the equipment itself, its brand, type and power.
In which devices do compressors change:
- Air conditioners
- Ice makers
- Air dryers
- Refrigerators
- Freezers
- VRV and VRF systems
- Chillers
- Rooftops
- Refrigerators
- Freeze Dryers
Replacing refrigerator compressors
The vast majority of refrigerators use low-power reciprocating non-inverter compressors in a sealed enclosure. The cost of such compressors is low, as is the time required to replace them - about 40 minutes, along with all the work.
But recently, the number of inverter compressors (with electronic control) and linear compressors (for LG products) has been increasing, the cost of such compressors is higher than conventional ones.
Replacing the compressor in the air conditioner
The main type of compressors used in air conditioners are rotary hermetic compressors with a capacity of 2.0 - 14.0 kW. The type of control is non-inverter in earlier models and inverter in recent models. Also a large percentage of scroll compressors.
A feature of replacing a compressor in an air conditioner is the need to dismantle the external unit and then install it in its original place, which increases the cost. Otherwise, all work is the same as on other refrigeration equipment.
Replacing the compressor in dryers
The dryers use medium and high temperature reciprocating and rotary type compressors.
In powerful installations, scroll compressors are also used.
Compressor replacement work
When replacing, the following work is carried out:
- Diagnostics
- Refrigerant evacuation
- Dismantling the compressor
- Flushing the system
- Compressor soldering
- Soldering filters
- Refrigerant charge
- Addition of anti-acid additives to the refrigeration circuit
- System start
Compressor selection
There are two ways to resolve the issue with the selection of a compressor - to purchase an original compressor or its functional analogue.
The first case is the simplest, since in this case it will fit exactly and there will be no problems with adaptation - fitting the fasteners, soldering adapters on the suction and discharge lines of the compressor, eliminating problems with excessive vibration, etc.
But this is not always possible for a number of reasons - the cessation of production of these products, the limitation of the work budget or the long delivery time in case of urgency of repair work.
In this case, it is quite possible to choose a similar compressor of a different type and manufacturer, and a higher-quality analogue may be cheaper than the original.
Main characteristics for selection:
- compressor power
- type of refrigerant (freon)
- dimensions
Measures to protect the compressor
To prevent a new compressor from failing, it is imperative to protect it. To do this, install anti-acid filters, dryer filters, add anti-acid additives.
It is also necessary to eliminate all the causes that led to the failure of the compressor, if they were:
- Fix freon leaks
- Install crankcase heater
- Install oil slings
- Set up oil return to compressor
- Set undervoltage protection in the network
Having made a step-by-step diagnosis of your Atlanta, have you established that the cause of the breakdown is in the compressor?
We remember physics
From the school physics course, we know about the structure of the internal combustion engine. The compressor functions in a similar way. The scheme of his work for Indesit or Atlanta is the same. The piston and valve system compresses freon, sending the heated refrigerant to the condenser. There it passes into a liquid state, enters the capillary expander. The compressor compresses the freon, then cools the gas in the condenser, ensuring its circulation in the refrigeration system. The process has a continuous cyclic character. The compressor is switched off, turning on from time to time to perform the function of compressing the refrigerant.
What kind of refrigerator do you have - the Belarusian Atlant or the Indesit assembled according to the Italian patent, they all have the same motor, a similar arrangement of internal circuits. In Atlanta and Indesit, reciprocating compressors are used. The piston compressor is equipped with a vertical shaft electric motor. The design is isolated by a hermetic casing. The turned on motor starts the crankshaft, which, rotating, moves the piston. The refrigerant is pumped out of the evaporator by the piston and forced into the condenser.
Where to start replacing the refrigerator compressor with your own hands
Repair of refrigerators and replacement of the compressor can be done independently by establishing the cause of the malfunction. If the compressor heats up after being connected to the network, the thermostat relay is most likely out of order. Replacing the refrigerator compressor relay is carried out even by an amateur. Does the motor suddenly turn off when you start the refrigerator for no reason? Refrigerator compressor motor replacement is best left to the professionals.
But you can try to replace the compressor entirely.
What you need
Check out the video and photo of the step-by-step process of replacing the refrigerator compressor with your own hands.
Then prepare the necessary tool:
- oxygen-propane burner;
- two valves: for piercing and refrigerant withdrawal;
- leak detector;
- thermometer electronic;
- small pipe cutter
- filter dryer:
- copper tube 6 mm;
- solder;
- flux;
- clamping pliers;
- Hansen coupling;
- charging cylinder;
- freon storage tank;
- new compressor.
Observe security measures. Do not start work when the device is turned on. Repair equipment must be grounded. Work is done with gas - the room should be well ventilated. Free the refrigerator so that you can easily lift and turn it.
Work process
When replacing the compressor of the Atlant refrigerator or any other refrigeration device, the compressor must be slightly extended. Raising it, break off the tube filling the freon, having previously cut it with a file.
Then you need to release the gas. Turn on the refrigerator for no more than 5 minutes. The refrigerant will move to the condenser. Attach the piercing valve with the cylinder hose connected to it, unscrew it for 30 seconds. The gas will collect in a container.
Solder a copper tube in place of the broken tube. A gas burner is used here, in the absence of a burner, a soldering iron is suitable. An incision of several centimeters is made on the capillary expander in order to break off the tube and unsolder the filter from the condenser. The compressor is connected to the refrigeration unit with two tubes (one for pressurizing, the other for removing excess gas).
It must be soldered from these tubes or cut off with a pipe cutter. The filter drier is cut off at a distance of 15 mm from the condenser. Remove the start relay. Dismantle the compressor and remove it from the refrigeration cabinet. Before brazing a new compressor, clean the piping.
When installing a new compressor, all steps are repeated in reverse order:
- place the compressor in the refrigerator, fixing it on the traverse;
- plugs on the nozzles must be removed;
- it is important to depressurize the unit 5 minutes before soldering;
- when removing the plugs, check that there is no excess air pressure in the compressor (this will be indicated by the noise of the outgoing air;
- gradually connect the discharge, suction and filling tubes to the compressor nozzles, the filling tube must be 6 mm in diameter and 60 mm long;
- start soldering the seams on the tubes, adhering to the following sequence: filling, suction, discharge, make sure that the burner flame does not go inside the compressor nozzle;
- after removing the plugs from the filter-drier, attach it to the condenser, connect the capillary tube to it;
- solder the filter at the seams;
- and put on the valve half-coupling of the filling pipe;
- check the quality of the soldering of all seams, they should be smooth, without soldered spaces;
- refuel with freon by connecting a vacuum filling station to the coupling and removing moisture from the system;
- mount the start-up relay on the compressor by connecting the electrical wires;
- turn on the refrigerator, fill the system with freon, leave for 5 minutes;
- use a leak detector to check if the tightness of the seams is broken;
- perform a secondary evacuation of the refrigerator, leave it to work for 20 minutes;
- pinch the filling tube, remove the coupling, solder the tube.
Results
Your refrigerator is ready to go, start the engine. After that, you need to check the functioning of the relay. If it starts, then you have completed the task.
Having gained a positive experience with your own hands, you can now give advice if one of your relatives or friends has a similar problem. And in difficult times, you can earn extra money by performing the operation to repair the refrigeration unit, which is no longer difficult for you.
If the motor-compressor breaks down, a master is called to replace the part. In this case, many are confused by the issue of cost - the compressor itself is not cheap, and you also need to pay for repairs, the price of which can be several thousand rubles. If you manage to replace the motor yourself, it is enough to find out how much a new compressor costs and not overpay for repairs. Armed with detailed instructions and the necessary tools, you can temporarily become a repairman for your own refrigerator.
We will describe below how the motor-compressor and oil in it are replaced.
To replace the motor, you need to thoroughly know the principle of operation of the refrigerator, be able to correctly diagnose the breakdown, paying attention to the signs. Before work, familiarize yourself with the device of the equipment, the main causes of engine failure and their symptoms.
It can be roughly divided into three main parts:
- evaporator;
- capacitor;
- compressor (consists of motor and relay).
If one of them does not function, and the remaining nodes are working, the refrigerator's performance is still lost.
The system is characterized by closed parameters. Freon is pumped from the evaporator by the compressor, after which it passes under high pressure to the condenser, where it cools, turns from a gas into a liquid and goes back to the evaporator. This is a continuous cycle of operation of refrigeration equipment.
Unlike other parts, the motor is always on. It starts after a signal from a temperature sensor, which reports an increase in temperature in the chambers. The relay starts the motor to start cooling the compartments. When the set temperature is reached, the relay is activated and the motor stalls.
The first sign by which a breakdown can be determined is a temperature jump in the main chamber. It can be so warm in there that all the food will go bad. There are other signs of failure of the main part of the refrigerator:
- ice has grown on the walls (especially true for models with the No Frost function);
- the motor hums, but does not produce cold, there is no refrigerant leak;
- clicks, rattling and other extraneous sounds are heard: noise, rattle, vibration.
- the motor runs continuously without stopping;
- food in the chambers freezes too much.
Sometimes a cable or a broken wire is to blame for a breakdown, so before starting repair work, you need to measure the resistance in order to protect yourself from injury.
To check the resistance, find a place where there is no paint. If there are no such places, wipe off the coating with a solvent. Take the tester and attach its probes to the body and contact. If nothing is displayed, then the device is working, and if there are numbers on the multimeter screen, it is very dangerous to repair the compressor at home. If you decide to work with such a compressor, be extremely careful.
To check the current, make sure the start relay is working. Take a multimeter with tongs - it is more convenient to check with such a device. If the motor power is, for example, 140 W, the measuring device should show a current of 1.3 A. The ratio of these indicators is the same if the motor power is different.
Breakdowns can be classified into two groups:
- Everything at first glance works fine - the compressor is buzzing, the light is on. In this case, a refrigerant leak may be relevant, and you can check it yourself - touch the condenser. If it's hot, then there really is a leak.
- The temperature regulator is broken, so if the chamber is warm, there is no signal about it.
If the equipment does not work at all, in every fifth case the motor is to blame. If this is not the case, it is worth checking the relay and temperature sensor. When they fail, they need to be replaced. If there are no failures in the operation of parts, the motor is to blame, and it needs to be replaced.
It is difficult to replace this part without the help of a master, but it is possible. Read on for how to do this.
Before you get started, prepare the tools:
- accumulator for freon gas;
- valves (needed for puncture and selection);
- burner.
Important! It is worth giving preference to an oxygen-propane burner.
To replace the compressor in the refrigerator "Ariston", "Indesit", "Atlant", "Stinol" or any other, proceed as follows:
Watch the video to get it right:
How to change compressor oil
If after replacing the compressor or relay it turned out that there is not enough oil in the system, then you need to replace or add it. Before draining, changing or refilling oil, you should consult with an experienced craftsman.
When else do you need an oil fill? We decided to consider this issue within the framework of this publication, because there are times when oil is not filled in a new engine, then you have to do it yourself.
Important! If the compressor does not turn off after replacement, the charging technology has been violated. Strictly follow the instructions when working with technical fluids.
- The container with new oil must not be opened until it is used.
- Buy liquid in containers of such a volume that it is enough for one gas station, otherwise you will have to interrupt the process and buy more.
- Do not transfer oil from one bottle to another and do not mix oils even of the same brand.
- When removing used oil, work using PPE - goggles, rubber or neoprene gloves. This is due to the fact that the oil may contain acidic impurities.
- To understand how much oil is needed for an old compressor, be guided by the amount of fluid drained.
What you need:
- Vacuum pump;
- filling hose with shut-off valve and screw type connection;
- manometer.
Replacement process
- Vacuum the system.
- Close the service valves on the motor.
- Connect the vacuum pump to one of the valves.
- Lower the compressor pressure to the minimum (about 0.1 bar). Stop the pump.
- Unscrew the oil plug on the compressor and screw on the charging hose with shut-off valve.
- Open the suction valve and let the freon into the compressor to slightly increase the pressure. Close the valve.
- Open the shut-off valve on the charge hose to bleed air.
- Open the oil can and dip the tip of the hose into the container until it reaches the bottom.
- Close shut-off valve. Start the vacuum pump again.
- After the pressure in the motor drops below atmospheric, carefully unscrew the shut-off valve. Now you can fill the compressor with oil.
- To determine its level, monitor the filling through the viewing window on the motor.
- Close shut-off valve.
- Stop the pump and apply a slight positive pressure by adjusting the opening of the suction valve.
- Remove the charging hose. Screw on the oil plug.
The video below will help you better understand the refueling process:
This filling method ensures that there is no moisture or air in the system. There is a possibility of a minor refrigerant leak, which can be repaired with the right tools.
Important! When refueling, make sure that the oil container does not empty to the bottom, otherwise air will enter the system. If a precedent has occurred, then the oil fill plug is closed, and the system is evacuated.
If the oil needs to be topped up, it's easier to do so. Use for this purpose oil syringe. Do not be afraid that air will enter the system when the oil plug is opened, this is excluded.
If you have an oil pump, then use it - it doses the oil filling without reference to the pressure in the motor.
How long does the refrigerator last after compressor replacement? It all depends on the care and accuracy of your work. If your Liebherr, Samsung or any refrigerator is broken, you know how to replace the compressor and refill the oil. If this job seems difficult to you, play it safe and call a mechanic.
Dear Clients! All your questions are answered by our master on duty. By calling us, you will immediately receive professional advice on a defect in the operation of the refrigerator.
Attention! From June 10, 2016, our service center introduces a new, flexible system of discounts for both pensioners and low-income citizens, as well as for ordinary customers. The amount of the discount depends on the type of repair and can reach 10%. Contact us! All special offers
Dear Clients! Be careful! Today, the total minimum cost of replacing a motor-compressor cannot be less than 6000-00 rubles. Nobody will work at a loss. If you are offered to replace the refrigerator motor-compressor for a smaller amount, you should think about it.
We all want to get a good result for minimal money. But think about how often you are lucky to get a quality product or service for a meager price? When choosing a refrigerator repair service, always remember where the free cheese is.
Replacing the compressor (motor) of the refrigerator is a complex and time-consuming process. Work on its replacement refers to a complex (major) repair. In order to replace the compressor (motor), you must first remove the refrigerant from the refrigeration unit, then replace the compressor (motor) itself and the starting relay, while during the repair process it may be necessary to replace some other worn-out components. After carrying out the above operations, the tightness of the system is restored using high-temperature soldering. Then the system is freed from air and charged with a certain amount of a specific brand of refrigerant.
How much does it cost to replace a refrigerator compressor?
Minimum total the cost of replacing the compressor of the refrigeration unit in our service center - 7500 rub . The price depends on both the brand and the model of the refrigerator.
Below is the estimated cost of replacing the compressor of freestanding refrigerators of the most common brands.
Once again, we would like to draw your attention to the fact that estimated cost. Only the foreman or duty engineer (senior foreman) will be able to name the exact cost of replacing the compressor with your refrigerator model upon approval of the order.
Owners of refrigerators Samsung, Electrolux, Liebherr, LG, Bosch and other high-tech brands should be aware that an inverter compressor may be installed on their refrigeration units. The cost of replacing an inverter compressor is significantly different from the usual one. The minimum purchase price of such a compressor is $180.
In the photo below: inverter motor-compressor. As you can see outwardly, it is no different from piston crank or crank-rocker motor-compressors installed on the vast majority of refrigerators. To determine the inverter or conventional compressor (motor) installed on your refrigerator, as a rule, it is possible only after the diagnostics or by the serial number, product code of the unit.
Refrigerator compressor replacement - a job for a professional
The motor-compressor is the "heart" of the refrigerator, one of its main parts. Unfortunately, motor failures are not uncommon. He suffers from time, and from power surges, and from too intense work. It is possible to repair this part, but as a rule, repairs are extremely expensive, painstaking and cannot guarantee that the breakdown will not occur again. Therefore, if the compressor breaks down, it is usually replaced with a new one. Installing the motor is not an easy task, which, in addition to “removed and installed”, requires the system to be evacuated and refilled with freon. You can't deal with it on your own. Entrust the replacement of the compressor to the specialists of "RemBytTekh", and they will promptly perform the work - already within 24 hours after receiving the application!
Compressor replacement procedure
- Dismantling a faulty motor-compressor. The master will cut and break off the filling tube through which the system is filled with freon. This tube will be needed for the new compressor. Then, at a distance of 20-30 mm from the filter-drier, he cuts off the capillary tube so that freon leaves the system. After the refrigerant evaporates, the master removes (or cuts off) the suction and suction tubes from the faulty motor, they are soldered at a distance of about 10-20 mm from the compressor. Next, it remains to unscrew the motor mounts to the refrigerator body and remove the motor.
- Replacement filter drier. The third stage changes the zeolite cartridge, which is also a filter drier. The master will desolder or cut off the old one and solder the new one. The filter drier is a small but very important detail. It prevents small particles and moisture from entering the capillary tube, which can damage the refrigerator. The filter drier must be changed each time the refrigerator cooling system is opened. Its cost in relation to the total cost of repairs is low. But keeping the old part in place can significantly reduce the life of the new compressor.
- Installation of a new motor. The master will fix the motor in the housing and dock all the pipes of the refrigerator (suction, suction and filling) with the corresponding pipes on the compressor. Then solder the joints of the tubes with the motor.
- Vacuuming the system. After sealing all the seams using a special pump, the master will evacuate the refrigerator, during which excess moisture is removed from the system.
- Filling the refrigerator with refrigerant. When refueling, the master will also check the tightness of the soldering of all connections.