2ND MAINTENANCE TUNE-UP UNDER SA FOR HEATING UNIT. EARNED RENEWED SERVICE AGREEMENT. CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK ALL ELECTRICAL CONNECTIONS. INSTALLED 3 TON GAS PACK 12 YR PL. MADE SURE EQUIPMENT WAS INSTALLED PROPERLY AND MADE SURE WORK AREAS WAS CLEAN WHEN FINISH. EVERYTHING RUNNING GREAT.