1ST 13 POINT MAINTENANCE TUNE-UP PER SERVICE AGREEMENT FOR 5 YR HT UNIT. INSTALLED I WAVE PURIFIER. WT Y XX OLD HT. EQUIPMENT WAS INSTALLED AND WORK AREA WAS CLEAN WHEN FINISHED. CHECK BURNERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS ADJUST BLOWER COMPONENTS. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK THERMOSTAT, ENERGY CONSUMPTION, HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, AIRFLOW, AIR FILTER, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS WORKING GOOD.