1ST MAINT. TUNE-UP PER SERVICE AGREEMENT FOR 5 YR HT UNIT. REPL WTY CNTL BOARD. CHECK GAS PRESSURE AND FOR PROPER VENTING. CLEAN AND CHECK BURNERS AND BURNER OPERATION, CHECK THERMOSTAT, AIR FILTER, HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS OPERATING GOOD.