[W126 Coupe] Climate control quit working

[Dan Stratton]

The Climate control quit working on my 560 SEC. Never had a problem at  
all with it in the past , it just quit suddenly. Checked the fuse  
under the hood and it was fine. Where else do I need to check? I know  
it could be a problem with the control switches on the dash (had that  
happen on another 126 years ago) or a blower motor, but both  
intermittent problems, not a sudden quit like this time.

Dan