Display shows E10; unit powers but neither suction nor brush motor starts

Safety first: Disconnect from mains before opening the unit. Work on mains circuitry only if you are trained and competent.

• 1. Verify mains voltage
  • Test the wall outlet with a multimeter or another appliance to ensure stable voltage.
  • Avoid using long extension leads or multi-way adapters that may cause voltage drop.
• 2. Inspect power inlet and line filter
  • Remove the rear or bottom cover to access the power inlet and line filter PCB (if fitted).
  • Check for loose spade connectors, burnt components, or cracked solder joints.
  • Reseat connectors and replace the line filter board if damaged.
• 3. Check internal power supply
  • Locate the low-voltage power supply module on the main PCB.
  • If indicator LEDs on the board are off or flickering, the supply may be failing.
  • Replacement of the main control PCB or power module is recommended rather than component-level repair.
• 4. Professional service
  • Because this error involves mains and low-voltage electronics, a Bosch-authorized technician should perform final diagnosis and replacement.