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I have a question on the operation of the ACC in my '95 9k Aero. I think I hear the A/C compressor come on if I select ANY front defrost AND FOOT HEAT mode on the ACC unit EVEN if ECON button is pressed??? I though the ECON button made sure the compressor did not come on unless you selected the ORANGE DEFROST ONLY mode. Can I use ANY of teh front defrost modes without the compressor coming on??:x
 

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My understanding is that the ECON mode shuts off the AC compressor on all settings of the vents.


Defrost mode directs 90% or more of the available air onto the windshield and side windows. The temperature of the air is determined by the temperature selected. The AC does not come on just because you select "defrost".

I don't know what you mean by "orange" defrost but one of the buttons (the one with the square picture of a defrosting window) is simply a switch that turns on the rear window heater for about ten minutes.
 
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