pop your hood. spin the fan with you hand. at first mine was tight and after about 30 sec of spinning it realeased and spun like it was free. that is the problem if it spins freely its not working like it should. it should have some tension to it. as the engine spins it will spin the fan. it the clutch it bad it will not spin the fan at the speed it reguiers to cool your a/c down. it will look like its spinning but the air in not flowing good.

it will not over heat your car because of the aux fan. but it is not connected to the a/c in any way. only to the temp of the car.

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2003 4.4i black on black