Dash vent - AC and Heat issue...
Hi All, I've got a 2006 Four Winds Class C 31P Chateau. When I acquired it about 6 months ago I noticed an issue with the dash vents. The air (AC or heat) was only blowing out of the defrost and ...
Forum Discussion
Did you perhaps ask about this before? Default, for control system failure, is Defrost. Spring loaded toward that mode.
To run on level ground, you probably could run hose right from engine to vacuum controls and have it work. But on acceleration or climb, that would be inadequate. Hence, a little Vacuum Tank and a Check Valve to maintain vacuum till you need it. Problem on Ford E-Series, and many other Fords, is Valve and Tank are buried in the Heat-A/C console. Easiest, least expensive fix it to bypass the HVAC cabinet with new Valve, New Tank, and different Hose Routing.
I repaired our 2002 E450 by installing a combination Tee and Check Valve under the hood with a new Reserve Tank under the hood. From there, ran a new hose from there to the vacuum control "switch" valve in the dash. It worked well for awhile then didn't consistently stay out of Defrost when the engine was under load.
In my case, my new Check Valve was bad. Easy fix, OK since. In your case, could be anything. Loose or cracked connection or connector, hose, vacuum canister...?
Let us know what you did/had done to fix it, link to a previous thread (if that memory of mine is right and it WAS you) and we can try to help.
To run on level ground, you probably could run hose right from engine to vacuum controls and have it work. But on acceleration or climb, that would be inadequate. Hence, a little Vacuum Tank and a Check Valve to maintain vacuum till you need it. Problem on Ford E-Series, and many other Fords, is Valve and Tank are buried in the Heat-A/C console. Easiest, least expensive fix it to bypass the HVAC cabinet with new Valve, New Tank, and different Hose Routing.
I repaired our 2002 E450 by installing a combination Tee and Check Valve under the hood with a new Reserve Tank under the hood. From there, ran a new hose from there to the vacuum control "switch" valve in the dash. It worked well for awhile then didn't consistently stay out of Defrost when the engine was under load.
In my case, my new Check Valve was bad. Easy fix, OK since. In your case, could be anything. Loose or cracked connection or connector, hose, vacuum canister...?
Let us know what you did/had done to fix it, link to a previous thread (if that memory of mine is right and it WAS you) and we can try to help.
