Bosch Dishwasher Error Code d:06

Error code d:06 on a Bosch dishwasher indicates a motor control NTC relay failure. Specifically, the control board has detected that the NTC thermistor is reporting temperatures that are too high, or that the relay in the motor control circuit is stuck in the closed position. The dishwasher stops operating to prevent damage to the motor and control board. Diagnosing the fault requires running service test P:04 and then inspecting the NTC thermistor and relay.

No, you should not continue running the dishwasher while d:06 is active. The code indicates either an overheat condition or a relay that cannot be switched off, both of which can cause further damage to the motor, control board, or wiring if ignored. The dishwasher's control system stops operation specifically to protect these components, and bypassing or ignoring the fault increases the risk of a more expensive repair.

Repair costs depend on which component has failed. An NTC thermistor is generally an inexpensive part, and replacement parts plus labor typically fall in the range of $75 to $175. A relay assembly or motor control board is more costly, with parts and labor often ranging from $150 to $400 or more depending on the specific model and local labor rates. If the wash motor itself is overheating and needs replacement, costs can be higher. Getting a diagnosis before ordering parts is the best way to avoid unnecessary expense.

Some parts of the diagnosis, such as checking wiring connections and connectors in the motor control circuit, can be performed by a confident DIYer with basic electrical knowledge. However, testing the NTC thermistor for correct resistance values and evaluating relay behavior during the P:04 service test requires familiarity with appliance diagnostics and a multimeter. Replacing the control board or relay assembly is straightforward mechanically but should only be done after confirming which component has actually failed to avoid unnecessary parts costs.

A power reset may temporarily clear the d:06 code and allow the dishwasher to start, but the fault will return if the underlying component problem has not been resolved. A stuck relay or a degraded NTC thermistor will continue to cause the same fault on subsequent cycles. A reset should only be used as part of the diagnostic process, not as a long-term fix.