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2004 Ford Ranger Venting System

Tiny
MTTM
  • MEMBER
  • 2004 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 20,000 MILES
When I use the selector switch to change from defrost to defrost/feet or to any other selection, the venting system doesn't change to the desired setting- The fan works on all 4 settings- I'm not sure if this is an electronic function or vacuum- or what the problem may be-

Thanks for your consideration-

Mike-
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Sunday, February 10th, 2008 AT 8:43 AM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Stuck on defrost? Check under the hood for the small vacuum line that goes from engine through firewall to interior. Probably broken somewhere. Defrost is the default setting when no source vacuum is there
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Sunday, February 10th, 2008 AT 8:56 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
You have a vacuum leak, open the hood and look for the thin black vac line that goes into the firwall, this supplies the control head with vacuum, Does it change positions when truck is at idle? You may need to check the vac reservoir tank under the air filter.


https://www.2carpros.com/forum/automotive_pictures/62217_Resv1_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Tank_2.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Resv_1.jpg


If you find no leak, the selector function switch must be replaced.
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Sunday, February 10th, 2008 AT 9:05 AM

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