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I installed an electronic heater valve that loops coolant in the engine compartment when closed, and then opens the loop to the passenger compartment when required. It is variable so you can control the heat. The under dash cable is hooked up to a potentiometer that is supplied. Got mine off of E-bay. Ask the guy if he will sell you the one minus the crimping tool. Needle nose pliers work just fine. You also have to extend the wires with some ribbon cable, and adapt the heater hose at the core if you want to eliminate the mechanical valve.

E-bay Pantera Heater Valve

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Check this thread here on page 13 for some really nice work done.

http://pantera.infopop.cc/eve/...562/m/771104752/p/14

The part numbers are also listed several posts latter.

I believe that it is a Vintage Air Gen II compact. I am not sure if it will do all of the items you ask about - defrost, mixing, variable fan, etc. I have not investigated all that much.

The Gen IV Magnum will do everything you ask for sure and interfaces with the ISIS touch screen if you want to. However, this is bigger then the compact and I am not sure it will fit.
quote:
Originally posted by pantera3322:
... Still need info on how to install eletronicly adjusting units to operate cable for heat and AC unit.

This may not be applicable to your situation, but here is a photo of the potentiometer plate setup that came with my E-bay heater valve setup above.

Basically, you just want to shut off the hot water when operating the AC. The AC system is not efficient enough to warrant the moderation of cooling.

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