I took apart the area above the radio on my 1985 300sd. When i tap on the underside of the climate control unit while it is in the fan mode, high fan, i witness the fan blowing and then not blowing. As I tap on the underside of the unit it affects the connection. It happens when any button is pressed in...

I tested it from defrost all the way back to the fan buttons....

any suggestions on how to make this work properly?

__________________
1985 300SD

Well, as it turns out, 7 of the solder joints were cracked on the large flat board and perhaps one of the joints between the large flat board and one of the boards positioned 90° to it.

I resoldered those spots and now it works , "Showroom New"


I looked up CCU cold resolder to find the info since no one had any suggestions....

__________________
1985 300SD

Hey, sometimes people with knowledge of a particular thing are out of town... but that IS what the archives and search engine are for....

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Yes, so glad to have the archives (and this forum!)
Stay cool....

__________________
1985 300SD