Performed Platinum Comfort Club Membership Tune-Up on Cooling System Goodman heat pump system w/ AA213 filter. All system operation checks good at this time. Issue of dripping sound starting since performing duct cleaning stated by customer. Found filter box and box under coil with standing water due to cloggged drain. Cleared drain and shop vac to clean and see no other signs. Spoke on and will quote plasma air device to help maintain their effort of cleaning system.