WTF does Max A/C do?

[Homeslice]

Originally Posted by Particle Man

The manuals for my Grand Prix, Achieva, Explorer, and Mountaineer (not sure about the Kia or the Subaru I'll have to check) all said crack the window slightly for the first few minutes of operation to allow the MAX A/C to push the hot air out and then close the windows to allow the system to dehumidify the air and recirculate. It doesn't say "windows down" (nor did I say that).

I don't know if it's right or not (and I honestly don't care )

If your objective is to "push" hot air out the window, you'd be better served by using the Normal setting, since it pressurizes the cabin because it's drawing in outside air. On the Max setting your cabin air isn't pressurized, therefore you're not pushing as much air out the window as you could with Normal.

[101lifts2]

Originally Posted by Homeslice

If your objective is to "push" hot air out the window, you'd be better served by using the Normal setting, since it pressurizes the cabin because it's drawing in outside air. On the Max setting your cabin air isn't pressurized, therefore you're not pushing as much air out the window as you could with Normal.

The inside cabin is in no way "air tight" in any vehicle and you are always drawing in at least 10% outside air on the recirc button.

If you want to cool the cabin quickest and it's hot outside, you use the recirc function. This will make the differential temperature across the evaporator the lowest.

[Homeslice]

Originally Posted by 101lifts2

If you want to cool the cabin quickest and it's hot outside, you use the recirc function. This will make the differential temperature across the evaporator the lowest.

Again, what if the interior temp is hotter than the outside temp?

[101lifts2]

Originally Posted by Homeslice

Again, what if the interior temp is hotter than the outside temp?

And it probably is initially...but put in on Recirc. and 10 seconds later the temp will be less then the outside air temp.