I am guessing this issue is fairly common, but I have not found my exact problem so far on any forums. My heat works just fine, too well actually. It just wont quit. Well it turns off, but thats the only way to make the car non-oven like. The temperature dial does nothing. Wanted to know if anyone has suggestions for where to start troubleshooting. Seems pretty obvious I suppose, but its nice to get some ideas before taking things apart. Thanks in advance.

Search on 'servo' or 'evil servo' for the kind of knowledge you need but don't want. For specific troubleshooting hints, search on my username and 'servo manual'. Stick a needle in the nearest Chrysler before beginning work.

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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

It may be the cliamate control amp.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes