Hier, 14:21:36
The d21 error code does indeed correspond to a safety mechanism triggered by an excessively high water level.
Before replacing a circuit board, I would check the following in this order: foam quantity and detergent dosage, free flow of the drain, pressure chamber and pressure switch hose, solenoid valve not closing completely, and then the pressure switch value or switching behavior. It is essential to disconnect the power supply before opening the machine.
If the error recurs, note whether it appears during the filling cycle, immediately after filling, or during the draining cycle. Also, check if water continues to enter when the error is displayed: this helps to more quickly distinguish a solenoid valve problem from a water level measurement issue.
To compare other washing machine error codes by brand, here is a supplementary index:
https://www.errasift.com/washing-machine-error-codes/
For transparency: Errasift is my own website.
Before replacing a circuit board, I would check the following in this order: foam quantity and detergent dosage, free flow of the drain, pressure chamber and pressure switch hose, solenoid valve not closing completely, and then the pressure switch value or switching behavior. It is essential to disconnect the power supply before opening the machine.
If the error recurs, note whether it appears during the filling cycle, immediately after filling, or during the draining cycle. Also, check if water continues to enter when the error is displayed: this helps to more quickly distinguish a solenoid valve problem from a water level measurement issue.
To compare other washing machine error codes by brand, here is a supplementary index:
https://www.errasift.com/washing-machine-error-codes/
For transparency: Errasift is my own website.