JEEP

  • Tiny
  • kccoles
  • 1996 Jeep Grand Cherokee
  • 4WD

On my jeep heater controls win I swicth them to diff. Positions they stay on floor/ I can watch the acuators move but it dont change got the dash pulled apart to look but lost

Friday, January 28th, 2011 AT 11:28 PM

2 Answers

  • Tiny
  • mechman67
  • Member

They use a vacuum articulated system to open/close the blend doors on these vehicles. Use a vacuum pump to check for leaks on the position switch, blend door diaphragms, and lines. Be vigilant.

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Saturday, January 29th, 2011 AT 6:44 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

It sounds like a vacuum leak. Check under the dash as well as the supply line from the engine. If you are lucky, with the engine running, you may hear a hissing sound indicating where the leak is located.

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Saturday, April 2nd, 2011 AT 9:04 PM

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