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

[Dick Spellman]

Hi Rick:

Please check the separate 30amp foil fuse in the external holder up near 
your brake vacuum booster first.  It's bolted just to the inside of the 
engine firewall.

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

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