g. door opener constantly humming
The Chamberlain Liftmaster our builder put into our newbuild has a constant buzz - door open, door closed, it's constant. Only unplugging at ceiling stops it. Builder says he's had it checked and there's no problem..... there will be though if that thing still buzzes and final payment comes due! Seems at very least this could compromise its warranty & at very most be a fire hazard potential. Can anyone offer suggestions? Thanks.