I called Cool Air USA to service my Trane cooling unit that would never cool our house. The technician came right on time and he promptly went to work. One look and he told me there was nothing that needs “servicing”. He further checked the unit and discovered that it was the AC’s thermostat going bad. It wasn’t able to deliver cool air because of it. He suggested that I get a new thermostat and have it installed it myself. Since he didn’t need to do any work, he only asked for the regular service fee.