automatic temp control problem?!

2003 CHRYSLER CONCORDE
101,000 MILES
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KNIGHTRIDER81
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I have the atc in my concorde. Lately when the heat is set between 70-73f it will at randomly just start blowing colder air. Once I turn it up past 74 the heat comes back, it stays this way til I restart the car then the heat works again. I ran the calibration on it, it gave no code. Any ideas what this might be?
Dec 26, 2011 at 8:40 PM
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HMAC300
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unfotunately you relly need soemone who is more familiar with auto matic temp controlbecause there are so many sensors that can screw up and cause this. But you r blend door may be stickingif you restart and it works ok or one othe temp sensors that probably have to be tested with a scanner instead of your caibration. i'm sending a pic of the heater so you can check your blend actuator to see if maybe it loses power when this happens.
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Dec 26, 2011 at 11:46 PM
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KNIGHTRIDER81
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Would the camshaft position sensor cause this? I'm assuming not but that did just go out on my car yesterday. I just now finished replacing it but haven't drove anywhere to know if the heater was being affected. I was told a week ago that my cam sensor was about to go out because my cruise control has been randomly not working. I shrugged it off but I'll be danged if that mil didn't pop on with that very problem lol.
Dec 27, 2011 at 12:00 AM
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HMAC300
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no that is a seperate system nothing to do with the ATC
Dec 27, 2011 at 12:02 AM