Completed with ac 3 on 2012,2023 and 2012 all gas horizontal in attic, found kitchen area unit freezing up from evaporator coil and compressor making load noise with very high start up amps, 2012 upstairs has very start up amps as well. America standard MB operating great at this point. Giving the option to do all preventative, minimum repairs, ac combo upgrade for downstairs or complete upgrade. Customer wanted to get unit replace but cannot make a decision at this time. Will follow up next week.