A/C vents close after a short time

1999 FORD F-250
194,000 MILES • 7.3L • V8 • 4WD • AUTOMATIC
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LAWRENCE POWERS
  • MEMBER
  • 1 POST
A/C will blow cool air for about ten minutes then the vent will close for about five minutes. I changed the vacuum pump and it still does it.
Jun 22, 2018 at 6:36 PM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good morning.

Do any of the other doors close when this door closes?

I attached a vacuum chart for you. It may be the vacuum motor itself.

The motor is behind the glove box. Make sure it has vacuum to it to work.

Roy
Jun 24, 2018 at 8:09 AM
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