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Old 03-06-2009, 09:55 AM   #1
ToddR
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FYI
Running the heat on the "Defrost" setting will run the A/C compressor to remove moisture from the heated air. This will cause the same drop in fuel economy as running the A/C to cool the car. If you do a search here you will find a more detailed explanation.
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Old 03-06-2009, 05:40 PM   #2
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Quote:
Originally Posted by ToddR View Post
FYI
Running the heat on the "Defrost" setting will run the A/C compressor to remove moisture from the heated air. This will cause the same drop in fuel economy as running the A/C to cool the car. If you do a search here you will find a more detailed explanation.
I don't think so. You have to punch the A/C button to do that.
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Old 03-06-2009, 05:47 PM   #3
BailOut
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Originally Posted by NJBob View Post
I don't think so. You have to punch the A/C button to do that.
No, you don't, and that's the whole gripe that everyone has with it. Whether or not you have the a/c button depressed, if you use either of the dedicated defrost settings the a/c will run along with the heater, simply for the dehumidifying effect.
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Old 03-06-2009, 06:29 PM   #4
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Originally Posted by BailOut View Post
No, you don't, and that's the whole gripe that everyone has with it. Whether or not you have the a/c button depressed, if you use either of the dedicated defrost settings the a/c will run along with the heater, simply for the dehumidifying effect.
My bad...I guess. I can't find anything in the owner's manual but when I have the settings on defrost I can hit the A/C button and feel the compressor turn on. When I hit it again, it, of course turns off.

I'll have to see but I understand what you're saying. My Neon had the constant A/C to defrost which worked great but wasn't always necessary to clear the windows...not to mention it bumping up the rpm's and burning more fuel as consequence.
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