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I wouldn't call my 03 Malibu's system a automatic climate control, but AC runs when On Recirc & temp switch to cold, tried again this morning left home Recirc On, AC off, AC was running, stopped and shut off car. When started the car always turns the Recirc off, but AC was now on. AC always runs in defrost position as well.
I'll try it later to see if temperature controls AC operation when recirc is ON, maybe recirc is less efficient than non recirc in the winter. I only have put 200,000 miles on this car and I didn't know Recirc caused the AC to run till yesterday.
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