Operating Manual
In case of difficulty
About your new thermostat
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank
Make sure heating and cooling temperatures are set to acceptable ranges:
Temperature
settings do not
change
Follow these steps to restore default settings (see page 10):
To restore
default settings
69-1921EFS—03
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA alkaline
batteries are correctly installed (see page 17).
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
1. Press SET CLOCK/DAY/SCHEDULE.
2. Press SET SCHEDULE.
3. Press DONE and NEXT at the same time for 4 seconds.
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