2ND MAINTENANCE CHECK-UP PER SERVICE AGREEMENT FOR 5 YEAR HT UNIT. RENEWED SERVICE AGREEMENT. CHECK THERMOSTAT, AIR FILTER, HEAT EXCHANGER, AIRFLOW, HIGH LIMIT CONTROL, FAN CONTROL, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. EVERYTHING IS RUNNING GREAT.