[W126 Coupe] Heater Blower Motor

[Vance Rowley]

Hi Bellamy,

 I know this is a long shot, but some years back I had a problem with the climate control system. Difference being the blower motor seemed to work a little, but nothing like it should. At the same time I wasn't getting any heat from the system unless I was stopped (and with the engine up to running temp) If I accelerated, it went cold. Again the blower motor didn't seem to work well. It turned out to be the auxiliary water pump. Once this was replaced, the blower motor worked at full blast and with full heat when it was set to hot of course whether stopped or under full acceleration.
Also, as you have mentioned yourself, some years and models have the fuses in different positions. According to my manual, the blower fuse is position #16. But this changed to an in-line fuse on other years and models. Forgive me if this sounds stupid, but are you sure you have tested the correct fuse.

Good luck. Hope you find your problem quicker than I am with mine.

Cheers,
Vance.
  ----- Original Message ----- 
  From: Mister McGoo 
  To: mbcoupes at mbcoupes.com 
  Sent: Tuesday, March 14, 2006 11:22 PM
  Subject: [W126 Coupe] Heater Blower Motor


  All;

  I have another electrical problem looking for an answer.

  The blower stopped running, to the best of my knowledge while I was driving.  There is no power at the motor now.  The climate control system has had no problems up until that point.  

  The motor never made any rude noises, ran silently and smoothly

  The fuse is OK

  The fan (motor) runs fine (put 12v to the motor),

  The blower control unit - fan speed controller is OK (switched with a known good unit) 

  Does anybody have experience with the push button controls failing or the climate control unit itself?  What other components have control over the motor power supply?  Appreciate any ideas..........

  -Bellamy





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