2014 Climate Control
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Elder User
Joined: Apr 2010
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From: Steeler Country
2014 Climate Control
I got the Auto climate control with touch screen. I figured out the dual control, and the MY TEMP setting. But I set it to Auto and I see the A/C is also on. It is lit on the dash button and the screen. I can turn it off by pressing either, but I thought in Auto it would decide whats best and just do it.
Today was 56 degree outside in the morning, started truck and its set to Auto, 72 degrees and the A/C light was on. I played around to set temp to 82, A/C light still on even with heat coming out the vents. I don't know if this is normal or not.
I would think the A/c light would go out, or was it due to the defrost pumping too? I turned defrost on and off, no change in a/c light. Turn a/c off and no change in defrost.
Just thinking when set to auto, that should be only thing I see. Right or wrong?
Today was 56 degree outside in the morning, started truck and its set to Auto, 72 degrees and the A/C light was on. I played around to set temp to 82, A/C light still on even with heat coming out the vents. I don't know if this is normal or not.
I would think the A/c light would go out, or was it due to the defrost pumping too? I turned defrost on and off, no change in a/c light. Turn a/c off and no change in defrost.
Just thinking when set to auto, that should be only thing I see. Right or wrong?
Tuned
Joined: Jul 2003
Posts: 277
Likes: 0
From: NY
Scratching my head trying to figure out how to tell you that this is just normal in a way you could understand. The AC will just about always be on if it thinks it may need cooling or dehumidification. As long as the outside temperature dictates it is somewhere above freezing you will most likely see the AC on.
As a controls engineer this behavior is normal and sometimes it is hard for folks to understand just what the controller is doing. In simplest terms the controller reads the outside temperature and the interior temperature of the vehicle and determines what the best control scenario is for achieving your SET temperature. So in your case it was 52 outside and you were asking for 72 inside, most likely it read your interior temperature and thought that it would need cooled air and heat both. Just because you make it hotter, 82, doesn't mean it is going to turn the AC off because your internal temp may have already been close to that temperature and it didn't need to provide heat only.
I could go into a long discussion on heat/cool control but I don't think it would be much benefit. I hope this cleared things up for you.
Mark
As a controls engineer this behavior is normal and sometimes it is hard for folks to understand just what the controller is doing. In simplest terms the controller reads the outside temperature and the interior temperature of the vehicle and determines what the best control scenario is for achieving your SET temperature. So in your case it was 52 outside and you were asking for 72 inside, most likely it read your interior temperature and thought that it would need cooled air and heat both. Just because you make it hotter, 82, doesn't mean it is going to turn the AC off because your internal temp may have already been close to that temperature and it didn't need to provide heat only.
I could go into a long discussion on heat/cool control but I don't think it would be much benefit. I hope this cleared things up for you.
Mark
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Elder User
Joined: Apr 2010
Posts: 619
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From: Steeler Country
Ok, I just thought it would turn a/c light off and even if it thought the defrost needed to be on, the "main" a/c wouldn't be lit. I know the defrost uses the compressor, but in a manual control, the a/c doesn't light up when defrost is selected, even if using the a/c compressor.
Think I said it right???
You say it normal, ok
Think I said it right???
You say it normal, ok
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