York air conditioner emits musty or moldy odors when starting

Safety: Turn off power before accessing the coil. Wear gloves and eye protection when using cleaners.

• Clean or replace filters: Use high‑quality filters compatible with your York system.
• Clean evaporator coil: Access the coil and apply a no‑rinse coil cleaner designed for indoor coils. Follow label directions.
• Disinfect drain pan: Clean the pan and add approved pan tablets to inhibit growth.
• Improve humidity control: Ensure the system runs long enough cycles; consider a dehumidifier if humidity remains high.