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Q: air conditioning on 2006 Chevrolet Silverado 1500

Why would hot air be coming from the driver side vents and cold air be coming from the passenger side vents?
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If both sides of your climate control are set to equal temps then there is an air direction door malfunction.
I had the same problem with the AC running hot on one side. Took it to the dealership which replace some sort of relay switch for just about $280. Drove about 15 miles and it happened again. Called the dealership and they said it would cost another $280 (or so) to replace the other side. The solution that has worked for me without paying the additional cost... Turn off the engine and restart the truck -- the relay catches and cold air blows on each side. Pain but works. I haven't had the problem in about 4 months since then.
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