I completed a two system heating maintenance. We replaced media filters in the spring time and they are still good. Filters will need to be replaced in cooling Maintenance. I checked the amp draw on the blower motors and inducer motor. I cleaned the igniter and flame sensor on the furnace. I checked all capacitors and safeties. I checked defrost cycle and amp draw on the outdoor units. I checked all electrical components and confirmed proper sequence of operation. Systems are currently operating at manufacturers specifications.