A Bosch Washer With dr:08 Has a Drum Speed Sensor Problem

What dr:08 means

With dr:08 the inverter in a Vision washer cannot rely on the signal that reports how quickly the drum is turning. Bosch's name for the part is a speedometer: the little sensor on the motor that lets a front-loader hold an exact spin speed. The listed causes are a damaged sensor or failing wiring, and both need checking.

Common causes of dr:08

Speed sensor on the motor damaged
Wiring from the sensor to the inverter broken
Magnet or rotor ring damaged, so the sensor gets no pulse

✓ One safe check you can try

1. Run a spin program and observe the drum. 2. Make a note of whether the spin never gets to full speed, or whether it speeds up in surges. 3. Switch the washer off at the breaker afterward. 4. Pass these observations on to us. The sensor is mounted on the motor, beyond what an owner can reach, so the observations are the useful part.

! Why to stop there

The sensor is mounted on the motor behind the tub, where reaching it means moving the machine and removing panels.
Wiring near the motor can be damaged while you search for it.
Replacing the motor for what is a sensor or harness problem is expensive.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Washer codes

dr:15Bosch Washer dr:15 Gives an Early Warning From the Power Limiter dr:19Bosch Washer dr:19 Shows That the Motor Phases Don't Match dr:20Bosch Washer dr:20 Signals a Shorted Inverter Output Stage dr:21Sustained High Voltage and Bosch Washer dr:21 dr:22Bosch Washer dr:22 Reports Failure of the Inverter's Own Temperature Sensor dr:11dr:11 on a Bosch Washer Means Supply Voltage Sags Under the Motor's Demand Er:21Bosch Washer Er:21 Reports Too Much Foam Er:22Er:22 on a Bosch Washer That Can't Lock On to the Power Supply

dr:08dr:08 questions

Why can't the washer spin without a speed signal?

The inverter uses feedback to hold a target speed. Without it, the control cannot be sure the drum is safe to accelerate, so it limits or stops the spin.

Is a surging drum dangerous?

It shakes more than usual and strains the suspension. We advise stopping the cycle and leaving the washer off until the sensor and wiring are tested.

Does a speed sensor failure affect wash cycles too?

The washing action uses the same motor and sensor, so tumbling can also be uneven. Spin is where the problem is most noticeable. We test the sensor and wiring on the bench side of the visit.