Tech preformed CMA FULL SERVICE on 5 Gas Package Units and 4 Split Heat Pump Systems. Upon arrival tech was asked to look check thermostat for sanctuary( Gas Package #2) stating members where having a difficult time setting schedule on thermostat. Tech checked thermostat and schedule editing. Tech found that display touchscreen is not operating properly. And functions on the outer edge of touchscreen do work but any functions in the middle of the touchscreen do not work. Tech was approved replaced thermostat and set schedule for Sunday. Gas Package #1, #2, #4, and #5 are operating within specifications at this time. Gas Package Unit #3 does operate in cool mode but tech found multiple challenges with the heat side of system. Inducer motor and face plate have severe rust. Tech also found holes in heat exchanger. Condenser fan and capacitor are also beginning to fail and contactor is dark and pitted. Due to age and multiple challenges with system tech recommends replacement over repair.