The problem is vacuum isn't getting to the controls correctly or the control is defective. Check under the hood for a small 1/8" black plastic line that leads from the engine into the car in a wiring harness. The end of the lne should be connected to a vacuum source. Often the break due to heat.
Warranty? It shoild be depending on the in service date. 3 Years and 36K
Good luck
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Monday, April 10th, 2006 AT 5:26 PM