I performed a summer time tune up on two Goodman Air Conditioner units. Looked into the complaint of the system furthest from the water making a banging noise on start up. Looked over the system really well and got my amp readings from the compressor and fan motor and both are good. I tested the capacitor and found that to be weak. I replaced it with a factory capacitor I had on my truck. Cycled the system a few times after replacing the capacitor and can no longer hear the banging noise. The capacitor is covered under warranty Thank you for your business View visual findings from this job here - https://visionshare.xoi.io/?id=XA-BE96-76CEE8706046408884B21E793BFB30A2