[W126 Coupe] heater/AC blower motor failure ??

[Jim Ham]

I recall that the blower has a separate contact on the ignition switch. Try 
wiggling the key in the lock, if the blower starts up you need to replace 
the switch. It's an easy job as long as the key still turns in the lock. 
Mine is an '85, the later SECs may be different...

Regards,

Jim Ham

At 09:53 AM 9/5/2007, you wrote:

>The guys have great photos of both types on the mbcoupes list for you 

>Rick.  If that does not prove to be the problem, I'd start with a check of 

>the blower motor with 12vdc.  Hopefully, you do not have a passenger 

>airbag.  This makes access to the blower and the control unit easier.

>Last is the pre-resistance group under the brake booster which is a lot of 

>fun to get at (not).

>

>Was the blower every intermittent before this event?

>

>Dick

>

>Rick Granlund wrote:

>>HI-

>>   My '89 560SEC had been sitting for almost a month due to an extended 

>> business trip.  When I took the car for a much needed jaunt up the 

>> interstate I noticed that the AC didn't seem to work.  When I returned 

>> home I checked to see if the compressor was turning,,,and it was, but 

>> the fan (blower) was not blowing air...in any mode. i.e. fast, slow or 

>> automatic.  It is not a blown fuse because the blower motor is on the 

>> same circuit as other things that work properly.  When I select 

>> 'economy' the compressor turns off, so the climate control seems to work 

>> properly.  I assume it is either the blower resistor pack or the blower 

>> motor itself.

>>   On these cars, does a resistor pack failure put the blower into 'fast' 

>> as default?  Does anyone have the wiring diagrams and a troubleshooting 

>> procedure?  I think I should check the blower motor and/or the resistor 

>> pack with an outside +12 source to see if they operate but I don't know 

>> where it is or how to get to it.

>>   I would appreciate someone emailing me the procedure for getting at 

>> the blower motor and resistor pack and checking them.

>>Thanks for all your help in advance

>>Rick

>>rickard681 at cox.net

>>'88 300CE (the baby coupe), '89 560SEC

>>The MB Coupes Website!

>>W126 SEC Mailing List

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

>>

>>

>

>The MB Coupes Website!

>W126 SEC Mailing List

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


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