I have a Gold Star GWHD 5000 AC wall Unit. Now my rooms pretty big and it usually fill it with freezing cold air like I like but lately it seems to be getting weaker. I have cleaned the filter and left it off to rest and nothing seems to work. IS there anything I can do to get back to max capacity. I check all the dials and there the same. I can afford a new one and would rather just fix this one.

