In Goodyear, AZ: PREVENTATIVE MAINTENANCE- Cycled system #3 on into cooling mode. Checked volt and amp draws. Cleaned and tightened electrical connections. Checked Freon levels and pressures. Changed return air filters and checked splits: Return 88/Supp;y 70. System is running within manufacturer specifications. Cycled system #2 on into cooling mode. Checked volt and amp draws. Cleaned and tightened electrical connections. Checked Freon levels and pressures. Changed return air filters and checked splits. Return 89/Supply 70. System is running within manufacturer specifications. Cycled system #3 on into cooling mode. Checked volt and amp draws. Cleaned and tightened electrical connections. Checked Freon levels and pressures. Changed air filters and checked splits. Return 88/Supply 60. System is running within manufacturer specifications. Service complete.