[W126 Coupe] air conditioner Refrigerant question

[Shayegan, Richard]

This is sorta related (my air con seems to be blowing cold at idle now even though it's in the 90's...perhaps it just needed to be used some after 6 years of never being switched on?). My air con will blow out the defroster/defogger vents even when I have the regular air con (the one with the non-filled in upper arrow) button selected. Which vacuum elements are these? I seem to remember them being the ones directly behind the glove box, but I recently replaced those and they work fine.
Thanks,
Richard

________________________________

From: mbcoupes-bounces at mbcoupes.com on behalf of Dick Spellman
Sent: Sat 6/25/2005 9:35 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] air conditioner Refrigerant question



Hi Mike:

That could be a loss of vacuum supply at idle to the make-up air door vacuum
diaphragms (2).  Have you replaced these yet?  They are $60 each from MB or
just buy the rubber diaphragm kit from George Murphy, $45 does all the
elements in the car.

Easy enough to check these by attaching a MightyVac with gauge to each hose
going to the respective vac elements by locating the distribution valve
along side the HVAC unit in the center console.  I just pull the passenger
center console side carpet panel.

Stay cool.

Dick

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