Fan/blower speed not working at med/high setting

[Jeff65]

Originally posted by gofishing
Took the switch apart and boy, there was so much gunk (years of dust mixed with ??) on the contacts. Cleaned them, put it back to tegether and working like new.

Thanks for the troubleshooting tips.

The gunk was electrical contact lubricant. Back when it was electrical motor grease. Today they use silicon paste. You can buy the stuff at Radio Shack in small tubes...believe they call it "transistor grease" since its used a lot in mounting high power transistors. If you assembled it dry, don't take it apart to redo it since you might break the tabs off the switch body. Next time, perhaps using a little of this stuff will extend the contact life.

Good to hear your repair was successful. Happy Mustanging!