I have a 94 F150 4.9L 2WD, My problem is when I turn on my a/c to max a/c it doesnt work or blow anything, when I swith it to normal a/c it comes on, this just started a few months ago, dont have any idea what it is, switch maybe? Any comments welcome.

 

Repair the white vacuum line under the R hood hinge.

 

Would that be driver or passenger side hinge?

 

L & R in a vehicle always means: from the operator's point of view while seated normally. But the pic I posted shows it.

 

Ok the white vacuum line was damaged, repaired it and didnt notice any difference in the blower speed, any idea why its not working?