Bosch Washer Er:09 and a Control That Lost Touch With the Motor Drive

What Er:09 means

Fill, then silence: the drum never turns. That is the usual picture with Er:09, where the main control can no longer talk to the circuit that runs the drum motor. Nexxt washers describe it as lost communication with the motor; Vision washers, which add a separate inverter board, describe it as a broken link between control and inverter. Bosch points both at the wiring harness.

Common causes of Er:09

Harness between the control and the motor circuit cracked or pulled loose
Plug on the inverter or motor not fully seated
Wiring rubbed raw against the cabinet frame

✓ One safe check you can try

1. Cut the washer's breaker, wait ten minutes and restore power. 2. Start a normal wash and watch the drum. 3. Note whether it turns at all after the fill. 4. If the drum stays still and Er:09 returns, stop and call us. The reset is worth a try, but a damaged harness will not mend itself.

! Why to stop there

The harness runs past the moving tub, so its insulation can be worn through and expose live conductors.
A loose plug and a failed inverter produce the same display, so swapping the inverter first is a costly guess.
Pulling connectors while powered can damage the board.

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:22Bosch Washer dr:22 Reports Failure of the Inverter's Own Temperature Sensor 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 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 Er:24Bosch Washer Er:24 Names the Relay That Feeds the Motor Drive

Er:09Er:09 questions

Why does the washer fill but not move?

Filling and draining are handled by the main control, while the drum motor depends on the link to the drive. When that link fails, the washer carries on until the first step that needs the motor.

Does Er:09 mean the motor is dead?

Not necessarily. The code says communication was lost, which is often a wiring or connector problem. We check the harness and connectors before condemning the motor or inverter.

Is it okay to leave water in the drum?

For a short time, yes, but arrange to have it drained. Standing water in a closed drum can develop an odor within a day or so.