Bosch Dishwasher Error Code E:6A00

E:6A00 indicates a water switch fault caused by a defective triac on the power module. The triac controls the water switch motor, and when it fails, the motor either stays permanently active or receives no usable switching at all. The control board detects the missing impulse feedback from the water switch and stops the cycle to prevent further damage.

A reset may temporarily clear the fault code from the display, but it will not resolve the underlying hardware failure. If the triac on the power module is defective or the water switch has failed, the error will return as soon as the dishwasher attempts to run a cycle. A reset is only useful for confirming whether the fault is intermittent or persistent.

Repair costs vary depending on whether the water switch, the power module, or both need replacement. Power module replacement is typically the more expensive portion of the repair, with parts and labor combined often ranging from $150 to $400 or more depending on the specific model and local labor rates. If only the water switch or wiring is at fault, costs will generally be lower.

Diagnosing this code involves testing the water switch for continuity and inspecting the wiring harness, which a knowledgeable DIYer can perform. However, if the power module is confirmed faulty, replacing it requires working inside the dishwasher with the unit powered down and involves handling main board components. If you are not comfortable with appliance electronics repair, a qualified technician is recommended.

It is not advisable to continue running the dishwasher with an active E:6A00 fault. The water switch plays a role in monitoring water flow control, and a faulty triac in a permanently conducting state could cause unintended motor activation. Discontinue use until the power module and water switch have been inspected and the faulty component replaced.