FIRST MAINTENANCE CHECK-UP PER SERVICE AGREEMENT FOR 4 YR HEAT UNIT. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK FAN CONTROL, HIGH LIMIT CONTROL, HEAT EXCHANGER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS RUNNING GREAT.