WIP COLD 3T AC FURNACE AND COIL. 10YP 1YL. INSTALLED THE UNIT PROPERLY AND WORK AREA WAS LEFT CLEAN WHEN JOB WAS FINISHED. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HEAT EXCHANGER, FAN CONTROL, HIGH LIMIT CONTROL, AND ALL ELECTRICAL CONNECTIONS. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK BURNERS AND BURNER OPERATION. EVERYTHING IS WORKING GOOD.