Ac repair in Peachtree Corners. Discovered power switch off to main level furnace. Homeowner signed up for maintenance membership. Performed maintenance on 2 systems. Discovered both systems with weak compressor starters, upstairs system main electrical switch buzzing which is a sign of failure, both systems could use a duct cleaning and surge protection. Systems cooling at this time. Homeowner moved forward with all repairs. Replaced compressor starters, upstairs main electrical switch and installed surge protection for outdoor units. Need to call and schedule duct cleaning for both systems.