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Registered
Join Date: Aug 2002
Location: Phoenix Arizona
Posts: 35
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Have you checked the three air flap servos for proper operation? I forget exactly how air is piped around in the HVAC, but If one or more flaps where malfunctioning you might have an issue that that. Pushing the defrost button puts the servos in a specific mode which could explain why you get heat.
Just a thought...
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