Strong musty or moldy smell from indoor unit when starting

Health note: Mold spores can affect indoor air quality. Wear a mask and gloves when cleaning.

• Clean filter: Wash the air filter thoroughly and dry before reinstalling.
• Access coil and pan: Remove the front cover of your Olimpia Splendid indoor unit to expose the evaporator and drain pan.
• Use coil cleaner: Apply a non-rinse foaming coil cleaner suitable for air conditioners to the evaporator fins and drain pan. Follow product instructions.
• Flush drain: Ensure the drain line is clear so cleaner and water can exit.
• Run in fan mode: After cleaning, run the unit in FAN-only mode for 30–60 minutes to dry the coil.
• Regular maintenance: Clean filters monthly and consider periodic professional deep cleaning.