have you investigated the servo? The resin in the inlet/outlet body had problems with being unstable when exposed to heat (funny, hot water runs through the darned thing). Every one that I've seen has been cracked. this means that the water either goes out the bottom and dumps on the ground (the reason that so many cars have the heater core bypassed and the heater hoses looped back into the engine block), OR it means that the crack was on the top and the water went up into the servo motors and rotted out the switches and brains. I am very pessimistic about these units, so take that into consideration. Dave Duricy, who seems to be much more patient and inquisative is a proponent of troubleshooting and wrangling these things, so that's the other side of the coin - don't let me get you down if you're a natural-born puzzle guy. Inspect for leakage/failure of the maroon resin in the lower body before investing much more time/energy in troubleshooting would be my advice. Sure am glad I live in a very temperate area and don't need mine, so that's another source of my unwillingness to try to fix it. If I lived in Michigan or Tempe, I'd probably feel different. Lastly, keep in mind that the manual HVAC control panel for a standard chrysler product from the same year will interchange exactly IF you have the patience to do it. I understand that Kerry Pinkerton did pull that one off, and is the route that I intend to take some week when I don't really have anything better to do. Best wishes on that challenge!!!! -Kenyon --- jhplc@xxxxxxxxxxx wrote: > Hi list, > > > Just got a 73 4dr and after checking all fuses, > vaccum and grounds on the Auto-Temp and jumping the > green master switch(assuming it was bad) and living > under the dash with the shop manual.. all it does is > make a click sound from the area around the master > switch/compressor switch and amplifier...could this > be the amplifer is bad, or worse the $$$ervo?? > > Thanks in advance > > Jerry/Pittsburgh, PA Kenyon Wills ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm