Dash Air
I have a 2010 gasser BayStar and I'm only getting air coming through the defrost vents. I have the Evans Tempcon system. I have taken it to a local reputable garage and after $500 + trying this and ...
Forum Discussion
You have a vacuum leak or disconnected vacuum line.
The system is controlled by Vacuum "motors" and if vacuum is lost DEFROST being the most important function is the default.
On a car the vacuum is normally tapped off the brake booster but on a Motor home the brake booster is often hydro, not vacuum. so it's tapped off the intake manifold. However the leak, break or disconnect can be in many places including the selector valve or the motors themselves.
The system is controlled by Vacuum "motors" and if vacuum is lost DEFROST being the most important function is the default.
On a car the vacuum is normally tapped off the brake booster but on a Motor home the brake booster is often hydro, not vacuum. so it's tapped off the intake manifold. However the leak, break or disconnect can be in many places including the selector valve or the motors themselves.
