2003 Ford F150 AC & Blower Switching from Panel to Defr

2003 FORD F-150
100,000 MILES • V8 • 4WD • AUTOMATIC
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CCRAIN33
  • MEMBER
  • 1 POST
Using either the AC or the Blower the vents switch from panel to defrost.
Sep 2, 2010 at 2:51 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
You are looking for a vacuum leak in this case. Check under the dash first. If you are really lucky, you may hear a hissing sound with the engine running.

Let me know what you find or if you have other questions.
Joe
Sep 2, 2010 at 6:57 AM
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