In Avondale, AZ: CYCLED DOWN STAIRS SYSTEM ON IN COOLING. CHECKED VOLT AND AMP DRAWS, ALL IN FACTORY SPECIFICATION. CLEANED AND TIGHTENED ELECTRICAL CONNECTIONS. CHECKED FREON LEVELS AND PRESSURES, ALSO IN FACTORY SPECIFICATION. (SEE COOLING CHECKLIST FOR DETAILS). ACID WASHED OUTDOOR COIL AND RINSED. CHANGED RETURN AIR FILTERS AND CHECKED SPLITS, RETURN 74 SUPPLY 54. SYSTEM IS RUNNING PROPER AT THIS TIME. CYCLED UP STAIRS SYSTEM ON IN COOLING. CHECKED VOLT AND AMP DRAWS, ALL IN FACTORY SPECIFICATION. CLEANED AND TIGHTENED ELECTRICAL CONNECTIONS. CHECKED FREON LEVELS AND PRESSURES, ALSO IN FACTORY SPECIFICATION. (SEE COOLING CHECKLIST FOR DETAILS). ACID WASHED OUTDOOR COIL AND RINSED. CHANGED RETURN AIR FILTERS AND CHECKED SPLITS, RETURN 76 SUPPLY 55. SYSTEM IS RUNNING PROPER AT THIS TIME.