Dash AC
I have a 2002 Winnebago Adventurer. No matter what I turn my control to, the air blows out the defrost vents and floor vents. I looked inside the front compartment but didn’t find any vacuum tubes. An...
Forum Discussion
garym114 wrote:
The F53 chassis has no vacuum system. the chassis makers have to add one to operate the heating/ac dash vent system. This system consists of a small 12v vacuum pump and a small vacuum tank and associated vacuum hoses that go to the dash controls.
If there is no vacuum the default vent path is through the defrosters.
Check all these vacuum lines around the pump and tank, usually under the hood in front.
You are correct for newer model F53. But the OP is 18 years old and back then they did use engine Vacuum to operate the blend doors. They went to a 12 volt Pump to stop the lack of Vacuum when under heavy throttle causing the Vacuum to go to zero and having the air come out the defrost ducts until vacuum was restored. Doug
