High-pitched whistling noise during operation

Safety: Unplug before checking seals.

• Check tank seals: Inspect the dirty water tank gasket and ensure the lid is fully latched.
• Inspect hose: Run your hand along the suction hose while the unit is running (briefly) to feel for air leaks. Replace if cracked.
• Clean nozzle: Remove the nozzle window and clear any lint or hair.
• Check filter cover: Ensure the filter housing cover is properly seated and not warped.