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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
someone has turned it on.
• There is a Power Outage:
If you lose electricity, you will not need to reprogram your thermostat. The
settings are retained in memory.
• A service reminder message is displayed:
The check filter service reminder message tells you that it's time to change
the furnace filter. Make the indicated changes and reset/remove the
reminder rmessage by pressing and holding the done button for about
three seconds.
• A system error message is displayed:
Table 4 below lists system error messages that may appear on the
thermostat display.
Troubleshooting
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