Water tank full indicator stays on even when the tank is empty and correctly installed.

Safety: Unplug the unit and remove the tank.

Steps:

• Float movement: Access the float mechanism and ensure it moves freely. Dry or replace a waterlogged float.
• Switch test: Use a multimeter to test the tank full switch. Replace the tank full switch assembly if stuck closed.
• Tank alignment: Confirm the tank is fully inserted and that any actuator tab is not broken.