I just installed a new AC pump and now when I turn the AC on with a load on the motor the pumps has a purge sound coming from it. It almost sounds like a realy weak BOV. I am just wondering if anyone else had this problem and was it something that needs to be looked at or is it normal operation. And if anone is wondering I did drain the system with a AC machine and serviced the new pump with the machine not one of those crappy bottles autozone carries. Also the AC blows cold. Thanks for any info anyone has on this.

Bryan