2001 Chevy S-10 No warm air to floor when selector switch i

2001 CHEVROLET S-10
145,000 MILES • 6 CYL • 2WD • AUTOMATIC
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S10GEH
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No warm/hot air is sent to floor when selector switch is set to floor, instead it come out the defroster vents. Warm air will come out the upper vents and defroster vents when the selector switch is set accordingly.
Dec 7, 2009 at 12:27 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
What you are looking for in this case is a vacuum leak. The vent doors are actuated by vacuum. Check under the dash and hood for vacuum leaks. NOTE: Sometimes, with the engine running, you can actually hear a hissing sound from a leak. Check that out to see if it helps.

Let me know what you find.
Dec 11, 2009 at 10:47 AM
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