T.O. EQU CAME OUT FOR AN ESTIMATE ON EQUIPMENT. INSTALLED 4T FURNACE. 12Y P&L. NEW SERVICE AGREEMENT. MADE SURE UNIT WAS INSTALLED PROPERLY AND WORK AREA WAS LEFT CLEAN. CHECK THERMOSTAT, AIRFLOW, AIR FILTER, HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, AND ALL ELECTRICAL CONNECTIONS. CHECK BURNERS AND BURNER OPERATION. EVERYTHING IS RUNNING GREAT.