75gmck25
Full Access Member
- Joined
- Oct 13, 2016
- Posts
- 2,266
- Reaction score
- 2,210
- Location
- Northern Virginia
- First Name
- Bruce
- Truck Year
- 1975
- Truck Model
- K25 Camper Special TH350 NP203
- Engine Size
- 5.7
I think that's kind of unusual behavior, because IIRC its designed so that if the vacuum fails it will default to being in the combo heat/defrost position for air flow. However, its been a while since I've worked on mine, so maybe I'm wrong.
When you put it on defrost, where does the air come out?
When you put it on defrost, where does the air come out?
