‘97 E-350, V-10 w/RV package, 260,000 miles. New (2,000 miles) Auto Zone clutch.
It makes cold air like crazy, in fact it frosts up the hoses in the engine compartment. I can’t turn it off. It’s stuck in the defrost setting. This is bad on cold nights.
Sometimes everything works correctly for a little while or till I go up a long hill so I made a new vac res but it worked the same.
I can remove a dash panel and watch the controllers move. When I have vac I can switch between settings and they all work. Then at the next change one controller closes and the other tries to move but fails. This is why I think I have a vac leak.
2 questions: Has my Auto Zone AC clutch failed so it always on?
Have you had this problem and found the vac leak? A new switch is only $50, if I remove the dash again I’m replacing it just because.