[V8] A/C Dash Vents

[dsaad at icehouse.net]

Mine is doing the same thing.  I replaced the control unit - which helped
for about a day - then the same thing again.  I think it is either a
stuck/sticky vacuum motor or vacuum leak. Neither is going to be fun to
find or fix.  My game plan is to expose the vacuum connector going to the
controller, split it, and apply vacuum from a hand pump to each line
individually to test the motors and test for leaks.  Not sure what else to
do.  There is a diagnostic mode on the control head - but it really only
tells you what you already know.

I am also temped to do the R134A conversion, but I think there is some
sort of crack in my compressor casting.  It works, but won't hold a full
charge, and if I take out one of the mounting bolts (like I just did for
the clutch job) a small blast of A/C juice comes out.  Since the leak is
into the bolt hole it seems to stabilize itself.

Meanwhile, my explorer has eclipsed 200K miles on the factory A/C charge.
I have given serious thought to adapting a Ford compressor into my car. 
They are cheap (relatively) and seem to last for ever.

Dave


> I have completed the retrofit of my R-12 system to R-134A using
> suggestions and BTDT from the list.   So far, it is working well.  My only
> question is I am not getting a great deal of airflow out of the dash
> vents.  Plenty from floor and defroster.  I would appreciate suggestions
> as to where to look for the mechanism that opens the dash vents and what
> might cause this.  I would be happy to just open it for the trip to the
> west coast, if that is possible.  I have not yet replaced the glove box so
> hope it may be there somewhere.
>
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