2003 Ford Expedition A/C vents

Tiny
DANANDLINDA
  • MEMBER
  • 2003 FORD EXPEDITION
Air Conditioning problem
2003 Ford Expedition V8 All Wheel Drive Automatic

A/C vents close when under a load.
Wednesday, July 15th, 2009 AT 2:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,310 POSTS
The vents are run by vacuum. When you accelerate, the vacuum drops in the engine which is causing the vents to close. You have a vacuum leak. CHeck under the dash and under the hood. With the engine running, you may actually be able to hear a hissing sound that would indicate a leak, but a vacuum leak is what you are looking for.
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Thursday, July 16th, 2009 AT 10:43 PM

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