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Originally Posted by fasternyou929
Still wrong. If I have my A/C running in my truck (Nissan), car (Mazda), or SUV (BMW) with Recirculate ON, then switch to MAX, you can HEAR the changes to the air speed. Exactly what that change is, I don't know, but it's clearly doing something more than recirculating.....
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It's forcing the air out of only the center vents...but you could have just PUT it on the center vents.
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....And the Nissan will modulate the auxiliary cooling fan when normal AC is on, whether or not recirculate is active. It runs 100% of the time MAX AC is selected. Whether it's the same on the others, I don't know, my wife drives them more than me....
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Remove your HVAC control head and then turn the thing ON to Max AC. If there is a different signal being sent in Max AC, then I'll agree that there must then be varying high side pressure ranges to run the condensor fan.