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Old 04-29-2002, 12:46 PM
Posts: n/a
mmcan, I am not that familiar with these systems, but it sounds like the problem is your control unit in the dash, but again I'm guessing.

I am however certain that by putting a manual valve in the heater line that you can stop the flow of coolant to the heater core, and thus kill the heat in the cabin. That may be enough of a fix. I also have a '79 300, which is currently under the knife, so to speak.

Good luck.
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