Works find after fix. When I first installed it, it had a nasty harmonic (noisy sound) on startup and while running. After a few hours of adjusting and trying to figure out why, it turned out that one of the screws by the motor of the unit was just hand tightened, loose and not tight enough at all. One I tightened it, it worked fine, the noise was gone. Given that I read and older review, just now, that complained of a noise, do yourself a favor and make sure all the screws are tightened before installing.3 stars because of the time wasted in fixing the new unit noise. Would be 4-5 stars if I didn't waste time on this simple fix issue, which IMHO should not have been shipped with a loose screw.