I'll second the idea of a new 12 volt heater motor. I bought one at the parts store. It looked exactly like the 6 volt motor. Bolted right in. Works fine.
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself. Operators are standing by to take your calls! Now cruising in the Passing Lane