Question about 2004 Pontiac Vibe
My pontiac vibe is making a clicking noise behind the glove box. when I turn on AC and it stops
There is a servo that opens and closes an air valve in the heating system. It's a two wire connection and presumably the only way the computer knows when the valve is open or closed is to sense high (stall) current in the servo motor. This is a poor design because it stresses a plastic secondary gear in the servo and can cause a couple teeth to break off. Now the gears skip (making the clicking sound) and the motor never stalls so computer never shuts it off and the clicking continues. It's an expensive part (of course) but I fixed mine by opening it up and reversing the secondary gear so that the bad section is never encountered in the 180 degree travel. To find it, take off the glove box and it'll be on the left side under there. Total cost? About 2 hours and $0.
Posted on Apr 26, 2015
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Posted on Jan 02, 2017
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