Window or wall around the unit shows signs of condensation, dampness, or mold growth.

Safety: Be cautious on ladders or when working near windows.

• Inspect seals: Check foam gaskets and seals around the window kit or wall sleeve. Replace or add window installation foam kit where gaps exist.
• Insulate: Add insulation tape around cold surfaces that contact warm, humid indoor air.
• Check drain routing: Ensure condensate drain hoses do not drip onto window frames or walls.
• Dry area: Clean and dry any moldy surfaces and treat with a suitable cleaner.