2007 impala, when I turn the ac off....a loud clicking/rapping noise comes from the fan area, stops after a few minutes.
4 Answers
I would inspect the AC belt and any idler wheels on it. Maybe when the AC compressor unloads it causes the belt tension to change and somehow make that noise.
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Make sure the fan is not hitting the cowling. All bolts/screws in place and shroud not loose. That's what it sounds like to me
blend door motor under dash is on its way out, get a new one, easy to change youtube
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