[DMCForum] Re: Air system/mode switch question

["Brian" <TK581@xxxxxxxxxxxxx>]

Well, I pulled out a good deal of the dash to get myself situated 
with the ac unit and the vacuum lines.  Same problem exists.  Upon 
visual observation I find nothing disconnected as far as vacuum 
lines go (as far as I can see them)  The selector switch units seems 
fine.  I pulled out the hoses to inspect it closely and nothing 
seems out of the ordinary.  The lever which controls the center 
consol vents is in good condition and when I push it it opens the 
doors fine but will not stay of course.

I kind of feel like I hit a wall here.  Nothing looks broken and 
I'll be damned if there is mearly a vacuum line disconnected.  Any 
other checks I can do while the dash is out?

thanks,
Brian
11280

--- In DMCForum@xxxxxxxxxxxxxxx, "Brian" <TK581@xxxx> wrote:
> Thanks for the input.  I'm pretty sure it has to do with the 
> controls or vacuum becasue it does blow just not my face.  When 
> selecting modes I don't hear a darn thing!  No flaps change in the 
> least.  I did this with the car running, fans, no fans...etc.  I'm 
> going to pop out the control knobs and visual check the vacuum 
lines 
> (unless no one thinks this is neccesary)  I'll have to check up on 
> the rod that you spoke of - making custom parts like that 
shouldn't 
> be too big of a deal - I have good sources for custom jobbies such 
> as that.
> > 
> > >--- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> 
wrote:
> > > Brian,
> > > 
> > > The a/c has several vacuum-actuated flapper doors, and it
> > > sounds like the one for your dash & door vents is not
> > > opening.
> > > There are a couple of things that can cause this.  First
> > > determine if it is a vacuum problem.  Does the mode switch
> > > hiss?  Do you hear the various flapper doors open & close
> > > when you turn the mode switch thru its full range?  Put the
> > > blower speed to "0" so you can hear better.  Momentary air
> > > noises are normal.  But a constant hiss from the mode switch
> > > is a leak.  Did you hear the doors move?  If not then either
> > > the mode switch is broken or a vacuum line is phuct.  If you
> > > did hear them move (which means that at least some of the
> > > actuators are getting vacuum) then most likely you have a
> > > broken vacuum actuator that controls the dash vents.  The
> > > arm on it is made of plastic, and they are known to break.
> > > Exact replacements are very expensive.  I would make a new
> > > arm first.
> > > 
> > > Let us know what you find.
> > > 
> > > Walt    Tampa, Florida

Yahoo! Groups Sponsor

ADVERTISEMENT

---

Yahoo! Groups Links

• To visit your group on the web, go to:
  http://groups.yahoo.com/group/DMCForum/
   
• To unsubscribe from this group, send an email to:
  DMCForum-unsubscribe@xxxxxxxxxxxxxxx
   
• Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.