1993 F250 HVAC System Vacuum Issue
#1
1993 F250 HVAC System Vacuum Issue
Howdy Gents
I have a vacuum leak in my HVAC system. Vent selector wasn't working, traced the problem to the black vacuum hose in this image. It goes into the AC coil housing, and to where? Its leaking, as when I plug the end of that hose, the selector works fine. Can't find any intel anywhere on where that male fitting on the housing leads to, but when I connect the black hose to it, and blow in, I can hear the air inside.
Anyone?
Thanks gents.
I have a vacuum leak in my HVAC system. Vent selector wasn't working, traced the problem to the black vacuum hose in this image. It goes into the AC coil housing, and to where? Its leaking, as when I plug the end of that hose, the selector works fine. Can't find any intel anywhere on where that male fitting on the housing leads to, but when I connect the black hose to it, and blow in, I can hear the air inside.
Anyone?
Thanks gents.
#2
Spent some more time on it and the plastic "box" that tube attaches to is the vacuum reservoir. On the Ford parts schematic it appears to be a separate chamber from the HVAC plenum. Blowing into it via the hose results in air going in but no pressurization of the reservoir, indicating its escaping to somewhere. Anyone ever come across this. Im assuming the reservoir is a sealed unit, right
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