I have an older model 77 300D with a climate control problem. It only works in the defrost mode. Otherwise, none of the buttons work. I have read all of the posts I can find about resodering the CCU, but they all seem to apply to the horizonal models while I have a verticle. Can someone tell me if resodering also applies to this one as well? I have checked the fuses and replaced them with copper fuses and they are all good. Is there another fuse for the blower motor somewhere that I haven't found? Any help would be greatly appreciated as it is getting hot here in Central Florida. Also, I need to r & r the vacuum pods. Can anyone give me source for these?

Bigbob2

Defrost mode is the default mode. George Murphy sells the pods and repair kits. Search on his name here for his phone number. He does not have a website unless things have changed recently.
My money's on a failed ACC servo. Junkyard, rebuilt with aluminum body, or the solid state retrofit system are the only real options. Performance will sell you a new one for $1600.
You could probably test your servo by plugging in a cracked, leaking but electrically/vacuum functional servo to see if your system gets back its features without hooking it up to the cooling system. Hate to spend that much money without a definitive diagnosis.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13