I have an Ameristar AC that will be 2 years installed next week. The person who installed no longer lives in area and the company owner will not respond to calls and texts. For whatever reason the thermostat says 81 when it is set on 74. It doesn't feel that warm in the house but is concerning. There is a small drip of condensation on the inside unit. This AC should be under warranty and I need to see who services Ameristar warranty work. Really would have liked to give referrals but you get the drift. Can anyone help?