ON MY JEEP HEATER CONTROLS WIN I SWICTH THEM TO ...

1996 Jeep Grand Cherokee

Tiny

kccoles

January, 28, 2011 AT 11:28 PM

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

2 Answers

Tiny

mechman67

January, 29, 2011 AT 6:44 PM

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

Jacobandnickolas

April, 2, 2011 AT 9:04 PM

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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