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Installation Guide
22
In case of difficulty
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 fresh AAA alkaline batteries are correctly
installed (see page 14).
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to
acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
Cannot change
system setting
to Cool
• Check Function 1: System Type to make sure it is set
to match your heating and cooling equipment (see
page 17).
Fan does not
turn on when
heat is required
• Check Function 3: Heating Fan Control to make sure it
is set to match your heating equipment (see page 19).