Kill the AC with Defrost on?

[fastpakr]

Those numbers make no sense whatsoever. A properly functioning system doesn't take that much power to operate.

 

[dvdswan]

System seems to be working fine. And any vehicle I've had, running the AC/defrost does take power to run and gas mileage.

 

[fastpakr]

Sure, some. Your numbers are easily an of magnitude out of line.

 

[dvdswan]

16 was the last fill up for the Expo. During the summer, which was not hot, I didn't use the AC much at all and saw a low of 18. No AC/Defrost the best I got was 20.8.

 

[Curious Hound]

If I turn the A/C off, I have to roll the windows down and stick my head out to cool off. That adds wind resistance and my mileage gets worse than running the A/C.

 

[fastpakr]

That's also almost certainly attributable to winter blend fuel differences.

 

[dvdswan]

Very well could be. I forgot about the damn 10% ethanol. Its just starting to hit my area. I grew up with it in PHX though.

 

[lil_Blue_Ford]

This is something I wanted to do with my trucks and never got that far. I like having the heater set to defrost/floor in the winter and I see no point in having the ac cycling all the time when I’m running heat anyway. Maybe if I really want to get elaborate make a circuit where every time the truck is shut off it resets to active and you have to manually switch it back off…

 

[RonD]

If you drive at WOT(wide open throttle) all the time AC will stay off

My wife does this, but AC being off is just a by-product of her "need for speed"