Dehumidifier blows warm air, but room humidity does not decrease.

Safety: Unplug the unit before performing an internal inspection.

Steps to improve dehumidification:

• Match capacity to room: Verify that the Whirlpool dehumidifier's pint-per-day rating is appropriate for the room size and moisture level. Upgrade if undersized.
• Seal the space: Close windows and doors to limit new moisture entering the room.
• Clean coils and filter: Ensure maximum heat exchange by cleaning the evaporator and condenser coils and the air filter.
• Check internal seals: Inspect foam gaskets around the coil and air channels. Replace missing or damaged foam to prevent air from bypassing the cold coil.

Test: After adjustments, monitor humidity over several hours with a hygrometer to confirm that levels are dropping.