Furnace precision tune up; clean and tune up furnace; clean burners, test ignition components, adjust gas level, test safety circuit, check indoor motors, checked all electrical components, tested indoor air flow, checked heating temperatures, and tested overall furnace operation. Boiler precision tune up; clean and tune up boiler; check/verify water pressure, inspect and clean burners, test ignition components, test/adjust gas level, test safety circuit, check motors and pumps, checked all electrical components, checked heating temperatures, test combustion, and tested overall boiler operation.