I think I have the same problem in this cold in PA. The thermostat switched over to emergency run, I just sent e-mail to the servicing contractor. I hope edwin will address this problem in a short time. In emergency mode the thermostat setting is not controlling temp. and the temperature runs till the system is turned off or switched back to auto mode. I just can't believe that these new systems are nothing else just aggravation. New unit installed in July 2013.