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Re: 1994 Jag XJS V12 Climate Control - vacuum to htr ctrl always on.
Posted to HVAC Forum on 7/30/2003

I dunno about Jags, but most Chryslers switch vacuum OFF in MAX AC (recirc) or full cold via a microswitch in the control head. If the control head is easy to remove, you might look for a problem here.

One problem common in vacuum systems is the fact they ne... Login to read more.