Display shows E10; trigger is pulled but no solution is dispensed, even though pump is not running

Safety: Unplug the Husqvarna carpet cleaner before opening the handle assembly.

• Inspect trigger mechanism: Remove screws from the handle housing and separate the halves. Check that the plastic trigger fully depresses the microswitch when pulled.
• Test microswitch: Use a multimeter in continuity mode across the switch terminals. Pull the trigger; continuity should appear when pressed. Replace the Husqvarna trigger switch if it fails this test.
• Check handle wiring: Ensure the small harness from the handle to the main body is not broken or pinched. Reseat connectors at both ends.
• PCB input check: If the switch and wiring are good, the main board may not be recognizing the trigger signal. Replacement of the main PCB may be required.