[W126 Coupe] Air Conditioning Diagnosis

[mavris2 at comcast.net]

Based on what I read, sounds like what mine did a couple of years ago.  It 
would work, for a while then go hot.  Just as you described.  And assuming 
your mono is good, and your push button climate control unit is working. And 
your elect fans are working-  Then your answer maybe this:

I gave up and took it to the stealership.  Turn out that it was the  A/C 
E.T.R. Switch.  Which stands for evaporator temperature.  New ones are 
around 70 bucks.  I'd try that.   Its location is down by the gas pedal if 
memory serves me right. Fixed my problem.  That's what it looks like below.

If you hear clicking in your consol, its the bush button climate control 
unit failing, this will cause all kind of wacky cool, heat, heat only or 
straight stuck on defrost...  Sounds like it coming from the center of the 
dash.  Little clicks, every now and then, and only when you have the ac on 
does it do it?

Jason


----- Original Message ----- 
From: "Dan Landiss" <dan at landiss.com>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Friday, May 11, 2007 8:15 AM
Subject: Re: [W126 Coupe] Air Conditioning Diagnosis



> on 5/11/2007 7:55 AM mfm at meyerprobateproperties.com wrote:

>> This should help find it I hope:

>>  http://www.kite.com/kite/w126/

>

> Thanks, and thanks Attila for your encouragement. I am going to try that, 

> but unfortunately my symptoms are the opposite of what Carl Crowell's Web 

> page described. I have good cooling UNTIL the engine coolant heats up, 

> then hot air air mixes with the cold. He had trouble getting ENOUGH heat.

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

> 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 20390 bytes
Desc: not available
Url : <http://www.pairlist.net/pipermail/mbcoupes/attachments/20070511/4af4f80e/attachment.jpe>