[W126 Coupe] main air flap is bass ackwards

Tue, 4 Jan 2005 12:39:10 -0500

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This makes perfect sense now. What I thought was "closed" is actually =
"open," and yes, before I replaced the element, when off the flap was =
towards the passenger cabin. Sadly, while this did fix some of my =
problems, it didn't fix them all. Still sometimes when I select heat, =
I'll get cold air out of the center and lower side vents and hot air out =
the windshield and upper side vents. Also, the center vents don't always =
turn on when they are supposed to and the foot vents don't put out as =
much heat as they should when the system does work properly (i.e. a lot =
of hot air comes out of the non-foot vents - none out of the center as =
it should be - and a little hot air comes out of the floor vents). I =
think I've got something blocking one of the vacuum elements since =
sometimes when it is not working properly, after a while I will hear a =
vacuum element go into motion and then everything will work properly.
Richard

________________________________

From: mbcoupes-admin@mbcoupes.com on behalf of Dick Spellman
Sent: Tue 1/4/2005 10:56 AM
To: mbcoupes@mbcoupes.com
Subject: Re: [W126 Coupe] main air flap is bass ackwards

Richard:  returning to this topic for a moment.  I had the occasion to
repair yet another 126 chassis climate control element this past =
weekend.  I
just want to make sure that what you perceive to be open is in fact =
open.
The resting state of the main air flap door when the ACC is off is =
closed.
Closed =3D the main air door is pulled up to the firewall not down to =
where
you can easily see and touch it.  This latter position is open while as =
you
look at it and it appears closed to the cabin.

So to restate the obvious, after repairing your vacuum elements and with =
the
system off, the door should have been up and tight to the firewall fresh =
air
intake leaving the top of the blower fan exposed to the cabin (basically
recirculation mode) or closed to outside fresh air.  If before the =
repair
this door was down to the cabin frame then it was in fact hanging open =
and
the vac elements were leaking preventing it from being pulled up to the
firewall.  Confused or does this make sense now?

Dick

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