Wow, sorry I'm late posting what happened ! The GE team, there were 2 of them, found that the blower fan had moved on its shaft and was rubbing on something. They simply loosened it, moved it away and retightened it. They charged $125 for that. Of course if I had opened it up it would have been something much more serous and I would have ended up calling GE anyway ... That's my luck :-(


Jim