The inside blower motor on my 2 1/2 year old AS Freedom 80 furnace just started chattering on start and stop operations. My service company says motor bearing going out, need new motor for $550+ and warranty for motor in this config is 1 year. The current AS web site shows 5 year parts warranty on these models now. Any one else had this type problem with a motor or a AS dealer who won't provide a 5 year warranty?