A/C control - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 01-12-2007, 05:03 PM Thread Starter
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A/C control

Why is it when you push the heat in my 2007, the a/c light comes. Have to manually turn off. Does anybody else have this problem do this? Mine is the automatic temp control digital control.
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post #2 of 6 Old 01-12-2007, 05:10 PM
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It sounds like you are trying to use the climate control rather than simply turning the heat on. If you select automatic temp control the a/c must be enabled just in case it needs to be used to cool down to your selected temp. If you just push the the floor control button and run the temp up or down to your liking, the a/c should not light up. Sorry if I'm not understanding you, but it sounds like you may be using the automatic temp control.
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post #3 of 6 Old 01-12-2007, 05:13 PM Thread Starter
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I will try that in the morning. Not use to all this fancy stuff yet. I'm use to analog guages.
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post #4 of 6 Old 01-14-2007, 12:11 PM
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Originally Posted by 720Deere View Post
It sounds like you are trying to use the climate control rather than simply turning the heat on. If you select automatic temp control the a/c must be enabled just in case it needs to be used to cool down to your selected temp. If you just push the the floor control button and run the temp up or down to your liking, the a/c should not light up. Sorry if I'm not understanding you, but it sounds like you may be using the automatic temp control.
Deere....I was wondering the same thing. During the winter I usually run my Auto Climate..unless the windows are fog, the I switch to defrost. But usually I leave the auto on all the time, and I just turn off the A/C. Now if I turn on the auto climate, leave the A/C lit up, and the truck wants to warm the cab, is it still effecient to leave the A/C on? I always thought with the A/C compressor running, the cab won't run as warm, I could be wrong. What do you think...or maybe one of the techs could chime in?

Eric
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post #5 of 6 Old 01-14-2007, 12:54 PM
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I don't use the auto in the winter. I just select around 68 to 70 degrees and vary the fan speed according to my comfort level. My reasoning for this is to turn the compressor off. You should notice that on auto you need to keep the thermostat set about 2 degrees warmer than with manual settings. Why run the compressor creating extra wear for it and extra drag on the motor when it's not necessary.

I'm not a big fan of the auto climate anyway, but I do use it in the summer months.
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post #6 of 6 Old 01-14-2007, 08:23 PM
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If you have the Climate control system off, and then press a temp button, it will automatically enable AUTO and the A/C. I'm not sure if the A/C is running full time in auto mode, but the light does stay illuminated regardless. Below about 38 degrees the A/C compressor won't run anyway. I would like to know for sure if the compressor runs if it's not required when you select auto.

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