Join Date: Mar 2010
Location: Sugar Land, TX
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AC quits when ESOF used
I thought I had read about this issue somewhere in the forum but can't find it now.
When I use the ESOF knob to shift from 2WD into 4WD , my AC suddenly quits and the defroster starts blowing like mad. In other words the vacuum solenoids that control all the duct work switch around.
I know I have vacuum leaks on both hubs so I have been locking the hubs manually. After a short while, everyting returns to "NORMAL" but it sometimes "cycles" thru this series again as long as I am in 4WD.
It's a real nusiance when it's 95+ outside and all we're trying to do is to get back to the TT on a rough back-country road.
Anybody got some guidance for me? Thanks, D
2011 F350 King Ranch CCLB 4WD, 6.7L,Bilstein Shocks, Hellwig Sway Bar.