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We asked HVAC pros how to stop a window AC from smelling musty—and the fix is surprisingly simple

Key Points Keep the air conditioner free of moisture buildup to prevent mold and mildew from growing.Regularly clean the ...
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We Asked HVAC Pros How to Keep a Window AC From Smelling Musty—And It Couldn't Be Easier

Keep the air conditioner free of moisture buildup to prevent mold and mildew from growing. Regularly clean the filter, drain pan, drain line, and coils to remove any mold or mildew. Fully clean, dry, ...