Bosch Washer Error Code d:16

Error code d:16 on a Bosch washer indicates a motor high temperature shut-off event. The washer's control system monitors the drive motor's thermal condition, and when the motor reaches an unsafe operating temperature, the machine shuts down to prevent permanent damage to the motor windings or associated electronics. This protective response is triggered either by excessive mechanical load on the motor or by a binding condition in the drum or drive system.

The most common root causes fall into two categories: mechanical resistance and motor-side faults. Mechanical resistance occurs when something prevents the drum from spinning freely, forcing the motor to draw excess current and generate heat. This could include worn drum bearings, a seized pump, an object caught between the drum and tub, or a failing drive belt creating drag. On the motor side, a deteriorating motor with damaged windings may run hot even under normal load conditions.

Diagnosing this code requires running test P4, which exercises the motor drive system and allows a technician to observe whether the motor is drawing excessive current or encountering mechanical resistance. During the test, listen for unusual sounds such as grinding or squealing that indicate a binding component. Manually rotating the drum with the power off can also reveal whether the drum spins freely. If significant resistance is felt, the source of the binding must be identified and corrected before the motor is run again.