Owner`s manual

37
What If . . .
“Aux heat on” is displayed (heat pump and Hybrid Heat
systems only)
Aux heat on is auxiliary heat. It applies only to the heat pump
version. If it is on, you will see
aux heat on. When it is displayed,
it means the system has determined that it’s too cold outside for your
heat pump to heat the house without help, so it’s getting help from the
electric heaters. This happens automatically.
“Em heat” is displayed (heat pump and Hybrid Heat systems only)
Em heat is the display term for emergency heat and applies only to
the heat pump version. When emergency heat has been turned on,
Em heat is displayed. You have to turn on emergency heat manually –
it doesn’t happen automatically – so if you see
Em heat on the display,
it means somebody has turned it on.
There is a power outage
If you lose electricity, you won’t have to reprogram the thermostat
because your settings are retained in its memory.