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New HVAC control unit
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Question
jwalker
I installed a new dual climate control unit today on my 2004 Silverado. Everything works perfect except nothing happens when you press the recirculation button. The light comes on but it neither turns on nor off, the air comes out the same speed, unlike the original unit.
Do I need to have this programmed / flashed to work with my truck or is it a bad unit?
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