| Hi
What year is your Ram? I have a lot of experience with the 94-01 models. They actually have both vacuum and cable operated plenum doors. The heater door is on the other end of the cable you describe, and is most likely the problem, and VERY hard to access as it is behind the dash, and parts of the glove box, etc.It is a door that allows the hot air from the heater core to enter the heater/air conditioning plenum (air box) There are several vacuum operated plenum doors that shift the airflow to different outlets, defrost, dash, floor etc. but they are controlled by the other knob. My 1995 Ram has the same problem you have, and I have been dreading the prospect of starting to fix it. Luckily, it doesn't get really cold where I live!
Hope this helps! |