Climate Control issue. 79 300SD
 

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.

It may be the cliamate control amp.