The Bosch washing machine worked properly, but suddenly it stopped pouring water into the tank, and the display shows error F28. What to do in this case?
You need to understand what fault code F 28 means: the water flow sensor is faulty in the Bosch washing machine.
The solution
How to troubleshoot without calling the wizard:
- Press the “On-Off” button on the control panel, as a result of resetting the program and the error.
- To reset error F28, you need to exclude a program failure in the Bosch washing machine. To do this, turn off your washer for 10-20 minutes, then turn it on. The error has disappeared from the display – you have fixed the problem. If the code is on the display again, read on.
You have taken all available measures to eliminate error F28, but after turning on the machine does not work: it means that you need to check the internal parts of Bosch SM.
Repair by own hands
When the machine gives error code F 28 on the screen, these elements are most likely out of order:
flow sensor
This device differs from the pressure switch in that it controls not the amount of water in the tank, but the amount that enters the Bosch SM. The water flow sensor in different models can be either a separate element or part of the inlet valve.
How it works:
- When drawn through the intake valve, water passes through the turbine.
- The turbine is equipped with a magnet and a switch.
- When water passes through the valve, the turbine turns. The number of rotations corresponds to the amount of water.
- The built-in magnet passes the switch with each turn, the latter turns off, sending a signal to the control module.
- The board commands the valve to stop dialing.
Why does the sensor fail:
- The Bosch machine is on and starts washing. But due to the lack of water supply or the formation of a blockage in the inlet hose, water does not flow. The turbine does not rotate, the display shows error code F28.
- Too low pressure (less than 0,2 bar) at flow prevents the turbine from rotating. The electronic controller stops the process, error F 28 lights up on the screen.
- When the control module fails, it cannot detect problems in the system. In this case, the pressure switch is activated, which, with a sufficient amount of water in the tank, connects the drain pump. The program stops, the error code F28 lights up on the Bosch CM display.
Summing up, we can say: check the quality of the water supply in the room, and at the same time inspect the water intake systems at the time of blockage. If everything is in order, the flow sensor needs to be replaced.
Filling valve
Another reason why there is no set in the machine may be a problem with the intake valve. How to fix the situation:
- Disconnect the inlet hose from the Bosch washing machine, check the mesh filter for blockage. Rinse under pressure from a faucet. The video will help you:
Control board
The cause of a board malfunction can be a short circuit, burnout of triggers and capacitors, or a malfunction of the resistors.
Repair of controller elements requires the ability to handle a soldering iron.
The control unit is the main and expensive part of Bosch SM. Therefore, in order not to damage it even more, it is better to contact a service center.