[W126 Coupe] AC Blower not working

[Paul Samarin]

Thanks for the diagnostics; I'll do some looking and follow Mike's 
directions.

Paul

On Oct 6, 2005, at 7:50 AM, Vedat Iplikci wrote:

> Paul,
>  
> There are mainly 3 points of failure apart from the fuses;
>  
> 1- The pushbutton assy (mostly a bad solder or broken circuit due to a 
> crack on the board) (Mike's reply is more thorough here)
> 2- The fan motor brushes
> 3- The resistor (if you're unlucky enough)
>  
> Mine was working intermittently. My mechanic first changed the motor 
> brushes with some after-market ones to no avail, then he re-soldered 
> every point on the pushbutton board, and finally cured the problem by 
> swithcing to original brushes. Now the fan never fails to run- even if 
> you don't want it to... It runs normally at every speed, but keeps 
> running at low when everyting is switched off. Even though he insists 
> it is the resistor, I can't help suspecting he made a short while 
> renewing the solders... I hope to look at it myself when I have the 
> time.
>  
> Vedat Iplikci
> 1987 560 SEC Euro
> ----- Original Message -----
>  From: Paul Samarin
> To: Mercedes Coupes Mailing Lists
> Sent: Thursday, October 06, 2005 5:24 PM
> Subject: [W126 Coupe] AC Blower not working
>
> On my 1986 560 SEC:
>
> The ac is working (I get cool air from the vents, which flows when I
> pop the sunroof up to create a slight draft), but the blower fan
> refuses to work in any of the 3 modes.  The 30A fuse outside of the
> fuse box was busted, so I replaced it and the fan worked again; then
> stopped.  That new fuse is still intact, but the #10 fuse in the fuse
> box was broken, so I replaced that one--no change.
>
> It is very hot in So. Cal. these days.
>
> What should I be checking next?
>
> Thanks,
>
> Paul
>
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>
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