I had problem with my upstairs AC. It didn't seem to control the temperature and it was too hot. I had a different company telling me that i need to replace the entire AC unit for 3k . Glad I got second opinion from Cool Air USA because the issue was Thermostat. They managed to find the issue right away , replace the thermostat for only 200$ and have the problem resolved. They are very professional, experience and will not try to rob you like other companies I worked with. I highly recommend considering Cool Air USA for your next AC repair.