Bosch Dishwasher Error Code F6

F6 on a Bosch dishwasher indicates a pressure sensor fault where the sensor's output signal has risen above 4.8 volts, which is outside the expected operating range. The pressure sensor monitors water level inside the tub during the wash cycle. This code is logged internally and only appears in the service diagnostic menu, not on the standard user display. The dishwasher will continue to run its programme normally when this fault is active.

Because the dishwasher continues to complete its cycles when F6 is active, it is generally safe to keep using it in the short term. However, an unreliable pressure sensor means the dishwasher may not be accurately monitoring water levels, which could eventually affect wash performance or contribute to other faults developing. It is advisable to have the fault diagnosed and repaired within a reasonable timeframe rather than ignoring it indefinitely.

Performing a reset may clear the F6 code from the service menu temporarily, but if the underlying fault with the pressure sensor, wiring, or control unit is still present, the code will return. Because F6 only appears in the service diagnostic menu and does not interrupt normal operation, clearing it without addressing the root cause simply removes visibility into the ongoing fault. A proper repair of the defective component is needed to resolve it permanently.

Some causes of F6 are accessible to a confident DIYer. You can inspect the pressure sensor hose for kinks or blockages and check the wiring connectors for visible corrosion or loose connections without specialized tools. However, testing the sensor's actual output voltage and diagnosing a faulty control unit requires a multimeter and familiarity with appliance electronics. If you are not comfortable working with wiring or internal components, a qualified technician should perform the diagnosis.

Repair costs depend on which component has failed. A replacement pressure sensor typically costs in the range of $20 to $60 for the part alone. If the control unit needs to be replaced, parts can range from $100 to $300 or more depending on the model. Adding labor for a professional technician, total repair costs can range from $80 to $400 or higher, depending on the root cause and local labor rates.