Unit emits a musty or moldy odor during operation.

Safety first: Unplug the unit. Wear gloves and a mask if sensitive to mold.

• Clean filter: Wash the air filter thoroughly and dry.
• Clean drain pan: Access the evaporator drain tray and clean with a mild detergent solution. Rinse and dry.
• Coil cleaning: Use a non‑corrosive coil cleaner suitable for aluminum fins. Follow product instructions and avoid oversaturating electrical parts.
• Improve ventilation: Operate the unit in a well‑ventilated area and avoid long periods of shutdown with water left in the tank or pan.