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

Steps:

Clean filter: Wash the air filter thoroughly with soap and water and let it dry.
Access evaporator: Remove the front cover to expose the evaporator coil and drain pan.
Clean coil: Use a non-rinse foaming coil cleaner approved for AC units. Follow product instructions.
Clean drain pan: Wipe out slime and debris from the pan. Ensure the drain hole is clear.
Improve drainage: Confirm the unit is properly tilted and draining.
Run fan-only mode: After cleaning, run the unit in FAN mode for 30–60 minutes to help dry the coil and reduce odor.

GE air conditioner emits a musty or moldy odor when running

Possible Causes