Unpleasant musty or moldy smell from indoor unit when it starts.

Safety first: Turn OFF power before cleaning. Use non-corrosive cleaners only.

• Step 1 – Clean filters: Wash filters with mild detergent and dry completely.
• Step 2 – Use coil cleaner: Apply an approved foaming evaporator coil cleaner to the coil surface, following product instructions.
• Step 3 – Clean drain pan: Wipe the drain pan with a diluted bleach or disinfectant solution to kill mold.
• Step 4 – Run fan-only mode: After cleaning, run the unit in FAN mode for 30–60 minutes to dry the coil.

When to call a technician: Severe odor problems may require professional deep cleaning or chemical treatment.