Water tank overflows even though the unit should shut off when full

Safety: Unplug the unit and empty the tank before inspection.

Steps:

• 1. Float inspection: Open the tank and verify the float moves freely. Clean any slime or mineral buildup that may cause sticking.
• 2. Switch test: Locate the tank full switch in the cabinet. Manually actuate it and confirm the unit stops when the switch is engaged. Replace the switch if it does not interrupt operation.
• 3. Alignment: Ensure the tank and float are correctly aligned so that the rising water level reliably triggers the switch.
• 4. Wiring check: Inspect the float switch wiring for unauthorized bypasses or shorts. Restore proper wiring if altered.