Performed clean and check on AC system and Gas Furnace. Checked refrigerant pressures, cleaned condenser coil, tested and inspected all electrical components, measured delta T, cleaned condensate trap and drain, tested and inspected blower motor assembly, conducted combustion analysis, cleaned flame sensor, checked filter, recorded all data needed, tested t-stat operations, cycled system in cooling and in heating. Advised customer that filter needs changed. Everything is operating normally at this time.