Carrier Comfort Touch-n-Go Owner's Manual page 51

Emergency heat (heat pump systems only) ............ page 33
You can manually set the thermostat to use emergency heat but it is the most
expensive option. If it's using emergency heat, the display will show Em heat when
you press the mode button.
Hold .................................................... page 30
This function holds the current set temperature.
Mode ................................................... page 46
This term refers to the type of operation your system is performing. The options are
heat, cool, emergency heat, heat cool, and off.
Override ............................................... page 30
This happens when you temporarily disregard the thermostat's programmed
temperature settings and schedules by using the temporary hold or hold options.
Smart Recovery ....................................... page 46
This feature allows your system to shift from one temperature period to the next
scheduled period at an energy-efficient rate.