2003 Heat/Air either all hot or all cold

[pamcampbell]

Any suggestions on a solution for the air conditioner/heating that runs either at 60 degrees or 90 degrees, no matter where it's set in between. Air conditioning specialists haven't been able to fix it & said it was a problem with the "master switch?" We sent the whole master switch unit off to a place in California to be re-programed, but that still did not work. Any suggestions? Thanks!

 

[Earthrider]

Hello,
I’ve a similar issue in that mine just blows hot air in any mode. I was told that it is the cold air door/ actuator not working. This also showed on my code scanner. Does anyone know where this is located and how to access it?

 

[biddle]

Lots of information in this thread- https://forums.fordthunderbirdforum...ne-side-2002-2003-2004-2005-thunderbird.9446/

 

[TNtbird]

I've got the same issue with my a/c. As Biddle posted, there are ton's of posts on this forum and others about how to repair. I've been researching for a few months and created a roadmap of repairs for myself of what to inspect and repair starting with the easiest and/or most inexpensive solutions working my way towards the more difficult and expense repairs.