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Hello one and all, i have a little problem with my Dodge, maybe someone has an idea of what is going on. i have no DTCs, all systems are a go. i have checked everywhere fior vacuum leaks. the problem is when i step on the gas my a/c goes from blowing straight out the front vents to blowing out the top window defroster. any ideas?
There should be a check valve in the vacuum line supplying the HVAC controls. If it's stuck, or missing, that can cause your issue. If the check valve is OK you've got a leak somewhere on the HVAC side of it.
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