[W126 Coupe] Squealing N3 module

[Dick Spellman]

Dan Landiss wrote:

> on 3/12/2007 1:14 PM Dick Spellman wrote:

>> Dan, the big question is, do you believe there is enough of a 

>> performance gain in the ACC by having a functional draft off the 

>> aspirator tube/blower to warrant the effort???

>

> The symptom that leads me to suspect a decayed rubber tube is that it 

> takes forever for the HVAC to notice the cabin temperature. For 

> example, it gets WAY too hot before the heat shuts off, and then WAY 

> too cold before it comes on again.

>

> I suppose I could fish out the little sensor and let it hang from the 

> roof...

>

> Hmm, there is a fair amount of empty space up there -- maybe I should 

> look into moving the aspirator blower?

>

Hi Dan:

Since this may or may not be the problem, why not temporarily clip or 
tape a piece of tube next to the roof sensor grid opening with the 
little aspirator blower powered off of your cigarette lighter and 
positioned at about the same point attached to the temp. tube to see if 
it makes any difference???  Easy for me to say where I have a spare 
blower that would not require I extract the one presently in the dash of 
whatever MB I wanted to test.  So, your saying an expected result is a 
more responsive heat/cool change-up with the blower working as 
originally intended?  Let me know what you think about just doing the 
experiment before pulling a new tube, etc.

Dick