jeep

1996 JEEP GRAND CHEROKEE
4WD
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KCCOLES
  • MEMBER
  • 1 POST
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
Jan 28, 2011 at 11:28 PM
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MECHMAN67
  • MEMBER
  • 36 POSTS
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 .
Jan 29, 2011 at 6:44 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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.
Apr 2, 2011 at 9:04 PM
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