Forum Discussion

kratedisease's avatar
kratedisease
Explorer
Jul 31, 2015

Does A/C turn off automatically climbing hills ? Ford F53

I was climbing a long hill in the mountains today when I noticed that the A/C unit stopped blowing after a extended climb but turned on again after I stopped climbing and the RV up shifted to 3 or 4th...
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dougrainer's avatar
dougrainer
Nomad
Jul 31, 2015
TNGW1500SE wrote:
I'd bet it's a vacuum leak. Find a auto repair shop that has a smoke machine and have them hook it up. The smoke fills the intake and all the lines with smoke. The leak will be easy to find.


It is NOT a Ford Engine system vacuum leak. The aftermarket Dash AC system, the vacuum systems they use have inherent leaks. So, when the engine goes to zero vacuum on heavy acceleration or hill climbing, the Dash AC system uses up the little available vacuum. Doug

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