Stuck on defrost
Forgive me if this question has been posted before, but I'm new to this forum.
I have a 2001 Dodge Ram 5.9L 4x4 and my vents are stuck on defrost. The controls work to turn it on/off, temp adjust and blower speed, but the vents won't shift over to floor, bi-level, or face level.
I took the control assembly out and put a test light on it, and only a few circuits lit up, but I was told the vents shift over under vacuum pressure?
Is this vacuum leak problem, or should I replace my control assembly? I'm not sure how to proceed.
If anyone has a solution please let me know. I'm new to working on my truck so please be specific.
Thanks so much in advance!