[W126 Coupe] Air Conditioning Diagnosis

[Dan Landiss]

on 5/11/2007 6:59 PM mavris2 at comcast.net wrote:

> 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.


The picture you sent looks like one of the earlier cabin temperature 
sensors, performing the function that is now in the overhead console 
above the rear view mirror.


> 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?


No clicking. Cold air on startup. Cold enough to make my fingernails 
hurt if I put them in the vents. As the engine warms up, warm air is 
also felt, but different amounts from different vents. To the left of 
the steering wheel are two vents. The bottom one blows cold until the 
engine warms up, then just slightly cool. The top one leaks 
cabin-temperature air until the engine warms up, then hot.

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"We have become morally ill because we have become accustomed to saying one thing and thinking another."  --Vaclav Havel <http://www.landiss.com/civillib.htm#1Jan90>

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