Came back out to do quoted work which was swap main drain line with emergency drain line since main one runs too long without proper slope leaving sitting water for long periods of time. Also chemically washed outdoor coil for upstairs (outdoor unit closest to garage door). Upon completion customer let me know last night still hearing noise. Recommended cutting into drywall to be able to identify cause of water spot and noise. Customer signed off on drywall waiver and is aware we are not liable for repairing after cutting open. Cut square in ceiling and found issues. Tapping coming from lineset hitting joist while running. Water spot coming from exposed suction line due to constant movement while it runs. Taped up suction line again thoroughly and added extra insulation around the line to act as shock absorber and prevent further tapping and wearing out insulation. Made customer aware of all repairs. Customer decided they will keep ceiling spot open until cooling season to ve able to v