In Scottsdale, near East Aire Libre Avenue and North 58th Street performing Fall preventative maintenance on 2 Amana air handlers. Cycled south system on into cooling and heating mode. Checked volt and amp draws. Cleaned and tightened electrical connections. Checked Freon levels and pressures. Changed air filters and checked splits. Unit is running within manufacturer specifications. Cycled North system on into cooling and heating mode. Checked volt and amp draws. Cleaned and tightened electrical connections. Checked Freon levels and pressures. Changed return air filters and checked splits. Recommend adding hard start kits for optimal start ups for the compressors. Unit is running properly and within manufacturer specifications.