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Unread 10-16-2013, 08:36 PM   #1
LoOpS
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Join Date: Feb 2008
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Jeep vibrates when idle with AC on

I have a 2013 Grand Cherokee and recently noticed a vibration when the AC is on and I'm idle at a stop light. It makes a low hum like noise and I think I can feel a vibration in the break pedal. Anyone else experience this or know what it is?

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Unread 10-17-2013, 07:10 AM   #2
biffgnar
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Sounds to me a like an issue with the AC pulley. When you turn the AC on the clutch engages and adds load to the belt if its not spinning true it will vibe. Either that or a bracket that holds the AC pump maybe be loose. Again when the clutch engages the pressure from the belt would be vibrating the loose bracket.
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Unread 10-17-2013, 10:29 AM   #3
Evildriver-3
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Could just be the idle up solenoid isn't working and you're a/c is lugging the motor.

But we could guess all day since you didn't give any details like your rpm isn't dropping whether it's with or without the a/c on.
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