Indoor unit emits a musty or moldy smell when starting up.

Safety first: Turn off power before cleaning. Wear gloves and a mask if sensitive to mold.

• Clean filters: Wash filters thoroughly with soap and water.
• Disinfect coil and pan: Use an AC-safe coil disinfectant spray on the evaporator fins and drain pan. Allow the recommended dwell time, then run the fan-only mode to dry.
• Clear drain: Ensure the condensate drain is not clogged so water does not stagnate.
• Use self-clean function (if available): Many Haier units have a self-clean or drying mode; run it regularly to reduce odor.