Defrost turning on A/C unit.. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 11-09-2011
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Defrost turning on A/C unit..

My trucks fan/air conditioning when set to either Top/Bottom blow or Defrost, turns the A/C on.

Is this suppose to happen? I thought the A/C only turned on at A/C.

This is a late question, I noticed it this summer after getting the A/C fixed, and just really didn't care because I had cold A/C in my truck, lol.
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Old 11-10-2011
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The ac works in all settings but floor only and vent only.
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Old 11-10-2011
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It makes sense that it runs with defrost (dehumidification), but drives me nuts that it runs when you have the floor heat on. I was thinking of installing a manual bypass switch for the compressor.
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Old 11-10-2011
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Floor only no ac, and its been done.
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Old 11-10-2011
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There is a how to on the manual sw, I think !
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Old 11-12-2011
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Floor only Vent only = no A/C compressor...

All other settings on the hvac dial run the A/C compressor
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Old 11-12-2011
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I don't know about you guy's trucks but I am pretty sure on my truck only the vent and the off position do not kick the A/C on.
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Old 11-12-2011
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This is why i like my Gen 3.
Only Defrost and A/C turn the compressor on.
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