Ebay sellers want 130.00 plus for a 30 year old used power module you can repair it yourself for 10.00. When the blower gets old and the brushes get worn it overloads the transistor and burns it out causing no operation of the blower. Remove the power module with a razor knife or some suitable cutting tool remove the material directly above the transistor. Its the one screwed to the heat sink. Buy some desoldering wire at radio shack and remove the solder holding it in. Remove old transistor and solder new one in. Sylvania ECG 130, NTE29 will work. Also i soldered in an inline fuse so if the blower motor wears again it wont blow the transistor again.