2 system checkout. Downstairs system mechanical type thermostat +-3°. Upstairs digital type thermostat +-1°. Filters clean. Luxaire unit 3-ton AC unit 11 years old-All parts are working within their normal ranges at this time.Freon levels perfect. All okay. Goodman 2.5 ton AC unit 6 years.Chemically cleaned outdoor unit. Freon levels perf ft. All okay at this time. No immediate concerns found with the operation of these units.