Brennan G Today I visited for the system not heating. Upon arrival I discovered the thermostat was on the heating mode and the indoor temperature was satisfied at 78*. I set the thermostat to 80 to test the heating. Within a few minutes the indoor temperature was 80°. I also verified the cool mode is operating normally. Joyce and I discussed how to operate that thermostat and I advised her to change the mode and temperature as necessary to keep her comfortable.