noise coming from a/c when the engine is turned off. on 2008 Chevrolet Impala

every time the engine is turned off there is a ratteling noise from the a/c. this goes on for a min. or more. the noise is there sometimes when we come back to the car.

1 answer
THIS IS PROB A NORMAL NOISE! IF ITS A HISSING NOISE ITS THE A/C SYST EQUALIZING ITSELF WHICH IS NORMAL THANKS LEE 702-629-2273