E11 displayed; unit runs but shuts down when trigger is pulled for solution spray

Safety first: Unplug the carpet cleaner before working on the handle or trigger assembly.

• 1. Inspect trigger mechanism
  • Examine the handle trigger for cracks or loss of spring tension.
  • Ensure it fully returns when released.
• 2. Access trigger switch
  • Remove the handle cover screws to expose the trigger microswitch and wiring.
  • Check that the trigger physically actuates the switch button.
• 3. Test microswitch
  • Disconnect the switch and test with a multimeter in continuity mode.
  • Continuity should change when the trigger is pulled and released.
  • If not, replace the Bosch trigger switch.
• 4. Inspect wiring to main PCB
  • Follow the trigger harness down the handle to the main body.
  • Look for pinched or broken wires, especially at pivot points.
  • Repair or replace the harness if damaged.
• 5. Reassemble and test
  • Reassemble the handle, ensuring no wires are trapped.
  • Plug in and test; if E11 persists, the input circuit on the main PCB may be faulty and require replacement.