A/c coil has been leaking for a long time. Long enough to have rust on it. Sellers plugged it and charged it so it would blow cold air. Air filters hadn’t been changed in several years – 4 inches thick with dirt. House has funky smell disguised with 15 plugs hidden behind furniture. Warranty will replace coil. Worrying that smell is mold. Any recourse if it is. Seller disclosed no issues with a/c and inspector missed it all. Thoughts?