Just got a new attic fan from a guy who replaced my duct work, the old fan was burned out and he replaced it. Anyway 1 month later its making noises like the bearings are going. He came over and sprayed WD40 on it and quieted down for acouple of hours and now its make to making noise.
Is there something else I can use to quiet it down or should I put some pressure on this guy to replace it. He's just saying "I'm just the installer, I'm not paying for the fan" then he says who's going to pay me for the labor?