Originally Posted by pattoves777
hi i have an issue with my heater and a/c, seems that my heater stays on even though my a/c is running.
My '01 2500 was doing the same thing.
I removed the dash only to find that a $10 blend door coupling broke with the door opened on the hot side air.
The plastic coupling is mounted between the control motor and door.The motor and coupling can not be removed without pulling the dash.
I will be taking some pics.
BTW,I think I spent about $160 for the switch thinking that it was the problem.