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

Safety: Unplug before cleaning.

Steps:

• Confirm sizing: Ensure the dehumidifier's pint capacity matches the room size and moisture load.
• Clean coils and filter: Wash the filter and vacuum both coils to maximize heat exchange.
• Check coil temperatures: After 20–30 minutes of operation, the evaporator should be cool and evenly damp, not just at one corner. Uneven cooling suggests refrigerant issues.
• Sensor calibration: If the unit cycles off while the room is still humid, the humidity sensor may be misreading. Replacing the sensor can improve control.
• Professional diagnosis: If performance remains poor, a technician should check refrigerant pressures and system integrity. Often, replacement is more cost-effective than sealed-system repair.