Heater Fan Short / repair

[Joshua Dale]

My interior heater/AC fan has stopped working - prior to that it would work here and there depending on how hard a bump I went over - now it has quit no matter the bump!



Any ideas?



Thanks - 2001 Sport Trac 120K miles



found this but will take more

http://www.mysporttrac.com/shared/msgboard9e.asp?BOARDNAME=MSG&VIEW=891456&REPLYCOUNT=16&sitename=mysporttrac

 

[Kevin Palmer]

Use a meter to read if there is voltage getting to the motor when the switch is in various positions. If so, then the motor is bad, which is not uncommon.



If it gets it only in the high position, (which the fan should work unless it is also bad), then it is the resister block that is between the switch and the blower.

 

[Gary DiPietroSr]

Since a bump was a factor, you most likely have an open connection, not a short. ( unless you are popping a fuse ) Maybe it's just a plug or connector. Do the meter thing like Kevin said. If you tap on the motor itself and it comes on, then it might be an open winding inside it.

 

[Joshua Dale]

Thanks all

 

[Joshua Dale]

Ok, checked blower voltage - a ok



Then w/ engine running and blower on full blast - I rapped it w/ a BFC (Big Friggin Crescent) and it started working!



Thanks all

 

[Rodger Tellefson]

FYI - put the link that you want in the space provided just above the "REPLY" button.

 

[Rodger Tellefson]

BTW - That was my post. You will be replacing the blower motor like I eventually did.