Heater motor switch

Reply Subscribe

Thread Tools

Search this Thread

Feb 24, 2004 | 08:28 PM

doc_nomad

Thread Starter

Senior User

Joined: Feb 2004

Posts: 112

Likes: 0

Heater motor switch

My heater motor switch only works on high, any suggestions. How is the low, med, high controlled on these.

Feb 24, 2004 | 08:57 PM

pursable

New User

Joined: Feb 2004

Posts: 7

Likes: 0

I just fixed this in my 93 f150, its the resister under the hood mounted in the blower housing next to the blower motor. Mine was mounted to the right of the blower motor. I picked a new resister up from the ford dealership for about $17.00. Pull the plug out and two screws hold it in the housing it was really simple to replace. Hope this helps

Feb 24, 2004 | 09:02 PM

kioolt

Senior User

Joined: Aug 1999

Posts: 488

Likes: 0

From: Bel Air USA

The current for all of the speeds except high is limited by a resistor in series with the blower motor. When the resistor opens up (no continuity) the only speed you will have is high speed when the selector switch is set to high. All of the other speeds will not work at all.

Feb 24, 2004 | 09:39 PM

doc_nomad

Thread Starter

Senior User

Joined: Feb 2004

Posts: 112

Likes: 0

Thank you very much, I had an idea it was something like that but I did not have any idea where to find the resistors. I do not yet have a repair manual.