Bosch Dishwasher Error Code #G

Error code #G on a Bosch dishwasher with an Apexx display means the control board has detected a water switch fault in which the water switch is not signaling that water flow has stopped. The machine interprets this as water continuously running when it should not be. This can be caused by a failed water switch, a stuck-open inlet valve, or a wiring fault between the switch and the board.

Start by turning off power to the dishwasher and inspecting the water switch and its wiring harness for visible damage, corrosion, or loose connectors. If the wiring looks intact, test the water switch with a multimeter to confirm it opens and closes correctly. If the switch tests bad, replace it. If the switch tests fine, inspect the water inlet valve for debris or a failed solenoid and replace it if it is not closing fully. A wiring or control board issue is less common but should be checked if the switch and valve both test good.

Cycling power may temporarily clear the #G code from the display, but if the underlying fault persists, the code will return as soon as the dishwasher attempts a fill cycle and the control board detects the water switch fault again. A power reset is useful as a first check to rule out a one-time glitch, but a recurring #G code requires physical inspection and likely parts replacement.

You should not continue running the dishwasher with a #G error active. If the inlet valve is genuinely stuck open and not closing, water can overflow into the tub and potentially onto your floor. The dishwasher correctly halts operation when this code appears. Disconnect power to the unit until you have diagnosed and resolved the fault.

If the repair requires only a new water switch, parts typically run between $20 and $60, and a DIY-capable homeowner can replace it in under an hour. A replacement inlet valve is usually $30 to $80 in parts. If you hire a technician, expect a service call fee plus labor, bringing the total to roughly $150 to $300 depending on the failed component. A control board replacement is the most expensive scenario, with parts alone often ranging from $100 to $250.