Thanks to those of you who recommended Norvac. It lead me on an awesome adventure of electronic nerdery! Also, my furnace still needs a new blower motor. The bearings in the one I have are going out...I happened to have a used blower motor is pretty dang good condition. The problem is that the spare I have is a 3-speed and the one I need is a 1-speed. Would anyone like to negotiate some kind of trade