How to repair and change the pump for a Bosch washing machine?

Without a pump, the washing machine cannot function, since this part is responsible for pumping out water after the main cycles. If it breaks, the washing process stops and the liquid remains inside the drum.

To learn how to repair or replace a pump for a Bosch washing machine yourself, where you can buy it and how much the repair costs, read the article.

What is this part and why is it needed?

A pump is a water pump. It is installed on all Bosch washing machines. The main purpose of the pump is to pump water from the tank into the sewer pipe. This small detail never goes unused. The pump will be activated during every wash cycle, rinse or other operation..

The Bosch washing machine has a circulation pump. It is used in conjunction with a classic pump. Water enters the tank and circulates throughout the system, which improves the quality of washing.

Principle of operation

The principle of operation of the pump is simple. It comes into play after the wash is completed, pumping out and draining dirty water and detergent residues.

The part is represented by the following elements:

• a motor that consists of 2 parts: a rotor with a magnet and a starter with a core and winding;
• rotor shaft with bushing;
• impeller;
• frame;
• seal;
• inlet and outlet pipes.

Principle of operation pumps:

1. To be activated, the pump must receive a signal from the control module to which it is wired.
2. After receiving the command, the impeller begins to rotate, pumping water from the tank into the sewer pipe.
3. First, the liquid enters a rubber pipe, which is connected with clamps to the tank and the volute.
4. Then, through the filter on the volute, the water flows onto the pump impeller. The role of the filter at this stage is very important, as it protects the part from small debris. If there was no filter, the impeller would jam after just a few wash cycles.
5. The liquid then enters the drain hose and passes further: into the sewer pipe, bathtub or toilet.
6. Pumping is carried out until all waste water is pumped out of the machine.

When there is no water left in the tank, the pressure switch will send a signal to the electronic module, and it will command the pump to stop working.

Location in Bosch washing machine

Bosch washing machine pump located at the bottom of the body. Above it is a tank with a drum. To visualize the part, you need to unscrew the back wall of the case, but you won’t be able to get to it this way.

Malfunctions

The most common pump failures in a Bosch washing machine:

1. Blockage. If the drain filter missed any small debris, it will end up inside the pump. Any foreign object can either degrade or stop the operation of the impeller.

   Even if the pump does not fail completely, it will operate at the limit of its capabilities. As a result, either the motor will burn out or the blade will break.

   If the motor is not dismountable, then repair is possible in the case when the debris did not lead to breakage of the blades, but simply got stuck in them.

2. Wear of pump elements due to long-term use of the deviceA. When the sleeve and shaft relax, the impeller will move freely relative to the axis and touch the housing. If there is significant wear, it may fall off completely. As a result, the pump will simply stop pumping water. Before this, the machine will work noisily during the draining stage. Repair in this case is impossible; replacement of the part is required.
3. Motor failure. If it burns out, then during draining the noise of its operation will not be heard. Voltage surges, blockages, and winding breakage can lead to malfunctions. You can try to replace the motor, but it is more rational from a financial point of view to purchase a new pump.

A pump malfunction is indicated by a lack of drainage or leakage of water from under the bottom of the device. The machine may stop working, with water remaining in the tank. If the reason really comes down to a pump failure, then one of the following codes will appear on the display: E18, F18 or F03.

Pump replacement

If the pump cannot be repaired, it will have to be replaced. First, the part must be removed, which will require partially dismantling the housing.

How to remove?

Algorithm of actions, following which it will be possible to remove the pump from a Bosch washing machine:

1. To remove the pump, you need to unplug the machine and move it away from the wall.
2. Then open the hatch located at the bottom of the front part of the housing. This is done in order to drain the remaining water. Even if the drum is empty, some liquid is still retained in the nozzles.
3. Then unscrew and remove the top cover, which is secured with 2 bolts.
4. The next step is to remove the decorative panel at the bottom of the case.
5. Under it you can see the bolt that holds the drain pump volute. It needs to be unscrewed.
6. Then you need to fix the tank so that it does not break the wires when the machine is in a lying position. To do this, you can put a piece of cloth folded several times between it and the wall of the case.
7. Turn the machine over and lay it on its side.
8. Remove the bottom, disconnect the pipes from the volute and the power terminals.
9. Unscrew the drain pipe to make sure that no foreign objects have gotten into it. If they are not found, the pipe is installed in its original place.
10. The pump is attached to the volute with 4 latches; to remove it, you need to bend the locking terminal and then release the pump.

How to replace?

Installing a new pump does not involve any difficulties. The part is mounted in place of the old component.

Procedure:

• connect the pump to the drain and fill pipes, securing them securely;
• fix the pump in its original place;
• screw in the bolt holding the volute;
• return the machine to its original position;
• Assemble the body, tighten all bolts.

After completing the work, you need to check the tightness of the assembly. This can be done in a simple and effective way. Place a sheet of cardboard or dry light cloth under the bottom of the device, on which water stains will be visible.

Then all that remains is to turn on the machine, selecting the shortest wash cycle. If there are no leaks, household appliances can be used as before.

Bosch will tell you in a video about replacing the washing machine pump:

Maintenance and operation

To prevent the pump from breaking down or to prevent the situation from reoccurring with a pump that has already been replaced, the following recommendations must be adhered to:

1. Operate the machine according to the user manual.
2. Before loading dirty items into the drum, check the contents of the pockets. They most often contain debris that leads to pump failure.
3. Fasten buttons and zippers on clothes before washing.
4. Clean the drain filter and its seat at least once every 3 months.
5. Don't delay repairs. If unusual sounds and noises appear, you need to disassemble the housing and evaluate the condition of the pump.

The pumps installed on Bosch washing machines are of high quality, so with proper and timely maintenance, they will work for at least 10 years.

Where and at what price can I buy it?

You can purchase a new pump in stores that specialize in selling original spare parts, or order it online.

When planning to make a purchase, you need to clarify the model of the washing machine, since the pumps will be different for different devices.

To buy a part that meets all parameters, you should count the number of fasteners, and also find information about the power of the motor.

The cost of the motor depends on the model of the washing machine. The more modern it is, the more expensive the part is. The average cost of a pump for a Bocsh washing machine is 1,500 rubles. There are parts on sale at prices of 1200 and 1800 rubles.

Cost of replacement and repair

Since the Bosch washing machine has a complex device, To replace the pump, the mechanics are asking a price of 2,000 rubles.. If the pump can be repaired, then you won’t have to spend money on buying the part itself. However, you will still have to pay for the specialist’s work.

If the repair was entrusted to a private master, then you should choose the specialist who has positive reviews. An employee who values ​​his reputation will be sure to provide a receipt for the work performed and give a guarantee for at least a year.

Conclusion

Pump malfunction is most often caused by violation of the washing machine operating rules or user inattention. If a breakdown occurs, you can carry out repairs yourself. In the absence of knowledge and skills, it is better to entrust this work to a professional.