Bosch Dishwasher Error Code Test (motor)

The Test (motor) error means the dishwasher's control system has detected that the wash motor is not running. The fault is associated with one of three conditions: a faulty speed control circuit, a short-circuited triac on the control board, or a failed reversing relay. The appliance cannot circulate water until the underlying cause is identified and corrected.

No, you should not attempt to run the dishwasher while this error is active. The wash motor is not running, so water is not being circulated or properly sprayed over the dishes. Running cycles will not clean dishes and may cause the heating element to operate without water movement, potentially stressing other components.

A reset will clear the error code display temporarily, but the error will return as soon as the dishwasher attempts to run the motor again and the same fault condition is detected. Because this error reflects a hardware failure in the motor, control board, or associated wiring, a reset alone does not fix the underlying problem and is not a substitute for proper diagnosis and repair.

A knowledgeable DIYer can start by checking the motor harness connectors for loose or corroded connections, which requires no parts and may resolve the issue. Beyond that, accurately diagnosing whether the fault lies in the control module or the motor itself requires measuring voltage at the motor connectors with the motor energized. Replacing a control board or motor is within reach for experienced DIYers, but working with line voltage carries real risk and many people prefer to have a technician handle it.

Repair costs vary depending on which component has failed. A replacement wash motor typically ranges from $80 to $200 for the part alone, while a replacement control board can range from $100 to $300 or more depending on the model. Adding professional labor, total repair costs generally fall between $150 and $450. Getting a diagnosis first helps avoid replacing parts unnecessarily.