1ST MAINT. TUNE-UP UNDER SERVICE AGREEMENT FOR 5 YR HT UNIT. REPL COND FAN AND CAP. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, FAN CONTROL, AND ALL ELECTRICAL CONNECTIONS. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS WORKING GOOD.