CLEAN AND CHECK A/C. CHECK THERMOSTAT, CHECK AIR FILTER, CHECK CONDENSER COIL, CHECK DRAINAGE, CHECK ALL ELECTRICAL CONNECTIONS, CHECK FREON LEVELS. ADJUST BLOWER COMPONENTS, LUBRICATE ALL NECESSARY MOVING PARTS. INSTALLED A 3TON GAS PACK W/T-STAT.MADE SURE EVERYTHING WAS INSTALLED PROPERLY AND WORK AREA CLEAN WHEN FINISH. EVERYTHING IS RUNNING GREAT.