1ST MAINTENANCE TUNE-UP PER SERVICE AGREEMENT FOR 2 YEAR HT SYSTEM. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL, THERMOSTAT, AIRFLOW, AIR FILTER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. EVERYTHING IS RUNNING GREAT.