Mechanics

JEEP GRAND CHEROKEE BLEND DOOR PROBLEM

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
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Kccoles
January 28, 2011.



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.

Tiny
Mechman67
Jan 29, 2011.
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.