CLEAN AND CHECK 2 YR HEAT AND AIR UNIT, INSTALLED 3,5 TON FURNACE. CHECK THERMOSTAT, AIR FILTER, HUMIDIFIER, FREON LEVELS, DRAINAGE, AND ALL ELECTRICAL CONNECTIONS, CLEAN AND CHECK CONDENSER COIL. MADE SURE EQUIPMENT WAS INSTALLED PROPERLY AND WORK AREA WAS CLEAN WHEN FINISH, EVERYTHING IS RUNNING GREAT,