Detailed instructions for replacing the pump on a Bosch washing machine
Partial or complete blocking of the process of draining water from the drum indicates that the drain pump has failed.
Along with external signs of a breakdown (water in the tank after washing, a hum during the draining process), the Bosch washing machine signals a malfunction of the drain pump with error F03.
Having studied in detail the issue of replacing and repairing a faulty pump, you can independently return the Bosch washing machine to working condition.
Content
What is this part, why is it needed?
The drain pump (pump) is one of the key elements of the internal structure of a Bosch washing machine, the main function of which is to remove liquid from the drum.
Principle of operation
The drain pump of a Bosch washing machine consists of two parts: a low-power electric motor (enclosed in a sealed housing) on the shaft of which an impeller and volutes in the form of a plastic pipe are fixed.
On one side the snail is attached to the pump body, on the other side it is connected by a pipe to the tank of the washing machine.
As soon as the control module gives a signal, the process of pumping water from the drum begins: the pump impeller starts to rotate, which pumps waste liquid out of the washing machine drum through a pipe.
During the draining process, the water passes through a filter element located in the pump volute (protects against the entry of small debris), after which it flows through the drain hose into the sewer pipe of the house. The pumping process continues until the water level sensor in the tank (pressure switch) transmits a signal to the control module that the drum is completely empty.
Where is it located in the Bosch washing machine?
In Bosch washing machines, the drain filter can be found behind the front panel, at the bottom of the case, under the tank.
To remove the faulty pump, it is necessary to partially dismantle the housing:
- Pull out the detergent dispenser.
- Open the hatch door and carefully pry off the thin metal clamp holding the rubber seal with a flat screwdriver.
- Tuck the cuff inside the washing machine drum.
- Unscrew the fasteners holding the UBL.
- Open the small hatch at the bottom of the washing machine and unscrew the drain filter (clean if necessary).
- At the top of the case, remove the fasteners for the cover and control panel.
- Unscrew the fasteners around the perimeter of the front panel and remove it from the body.
Behind the front panel, under the tank, access to the pump is available.
Possible faults
The root cause of failure of the drain pump in a washing machine is small debris sticking to the pump impeller.
In order to fix the problem yourself, you need to unscrew the drain filter (located in the lower part of the housing) and manually turn the blades through the opened hatch.
If the impeller does not rotate, it is necessary to dismantle the pump and clean the blades of accumulated debris.The second reason why the drain pump will outgrow its functions is that the pump motor has failed. A multimeter will help you check if this is the case.
Algorithm of actions:
- switch the tester to “Resistance” mode;
- Apply the multimeter probes to the pump contacts.
Zero readings indicate a short circuit, and readings exceeding 260 ohms indicate a fault in the stator winding. Identified malfunctions of the pump motor are indications for a complete replacement of the drain pump.
How to change?
Replacing a faulty drain pump takes place in two stages: dismantling the faulty element and installing a new unit.
How to remove?
Before starting repair work, The washing machine must be properly prepared:
- disconnect from the sewer system,
- close the filler valve,
- Pull the power cord plug out of the socket.
Then you can begin the dismantling process faulty pump:
Carefully disconnect the wiring.- Loosen the clamps of the pipes connecting the pump to the tank and the drain hose.
- Unscrew the screws holding the volute with the filter.
- Gently pressing the latch with a screwdriver, turning the pump relative to the volute, remove it from the body of the washing machine.
A video (photo) recording the process of dismantling a faulty pump will help when installing a new element.
Installing a new sump pump
Install a new pump that is suitable in size, mounting method and other technical characteristics very simple:
- install a new pump in place of the dismantled element;
- fix the pump with bolts;
- we connect the terminals with the wiring (in order not to make a mistake, we check with the previously made notes);
- Having previously checked the drain pipe and hose for blockages, we connect them to the pump volute and securely secure the connections with metal clamps.
After the drain pump is connected, the washing machine body is assembled in the reverse order, the household appliance is connected to the electricity network, water supply and sewerage, and a test wash is started.
Video instructions for replacing the drain pump in a Bosch washing machine:
Operating rules
To operate the washing machine for as long as possible without repairing (replacing) the drain pump Certain rules must be followed:
- When connecting yourself, carefully ensure that the end of the drain hose is located at least 50 cm from the floor.
- Heavily soiled clothes (especially those with traces of soil) are soaked for some time in a warm soapy solution before loading into the drum.
- Before each wash, carefully inspect and clean the pockets of small debris and small objects.
- To prevent scale build-up on the inner walls of the drain pipes, add a special agent that softens hard tap water along with the washing powder.
How much does it cost and where to buy?
New pump for washing machine selected according to the following criteria:
- type of fastening (3 screws, 3, 4 or 8 latches);
- type of wire connection (terminals or chip);
- manufacturer (Askoll, Plaset, Hanning, Mainox, Arylux, Coprecci);
- power.
It’s good if you have the opportunity to take a faulty pump with you to the store (in this case, selecting a new unit will become much easier).If this is not possible, to order a drain pump, you must inform the store salesperson or the manager of a specialized spare parts website about the model and year of manufacture of the washing machine.
Cost of a drain pump for a Bosch washing machine varies between 1000–2000 rubles. To avoid low-quality crafts, it is better to buy a new pump for your washing machine at specialized sales points for spare parts for Bosch appliances.
Repair price
Depending on the malfunction that caused problems with draining water from the drum, repairs (and in some situations replacement) will cost at least 1,800 rubles.
Included in the price:
- dismantling and diagnosing the faulty element,
- repair and installation of the repaired pump in its original place.
If the dismantled element cannot be repaired (determined after diagnostics of the pump), a new drain pump is installed (the cost of the part is paid separately).
Conclusion
Strict adherence to all stages of diagnostics, repair (and, if necessary, replacement) of a faulty drain pump will help you quickly resume the high-quality operation of your Bosch washing machine.
