Bosch Washer Error Code dr:11

The dr:11 error code on a Bosch washer indicates that the motor control unit is detecting a voltage level that falls below the acceptable operating threshold. The motor control board is responsible for regulating power delivery to the drive motor, interpreting signals from the main control board, and ensuring the drum operates at the correct speed and torque. When input voltage drops too low, the motor control cannot reliably perform these functions and triggers the dr:11 fault to prevent potential damage to the motor or drive system.

Low voltage conditions can originate from several points in the electrical path. The supply circuit itself may be delivering insufficient voltage due to a weak household circuit, a failing outlet, or inadequate wiring. However, internal faults within the motor control board are also a primary cause. A degraded or partially failed motor control unit may misread voltage levels or fail to regulate power correctly even when supply voltage is within normal range. Component failures on the board such as damaged capacitors, failed transistors, or burned circuits can all produce this condition.

Diagnosing dr:11 begins with running the washer's built-in diagnostic test P4, which specifically evaluates motor control function. If P4 confirms a motor control fault, the motor control unit requires replacement. Before replacing the board, it is worth verifying that the wall outlet and supply voltage are within the specified range for the appliance. If line voltage is adequate and the fault persists through testing, the motor control board itself is the confirmed defective component.