We placed an emergency call after 10 pm on Sunday night. On Monday, we received ~7:30 am phone call confirmation that a technician would arrive between 8-9am. AC was not working and Ioannis quickly discovered that the exterior on/off switch "pad" had been not been correctly inserted by previous technician during annual maintenance. He also discovered the refrigerant "can" was rusted and was able to replace -preventing potential down-the-road problem. Ioannis was professional, explained everything, and friendly.