Operating Manual
18
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below.
Most problems can be corrected quickly and easily.
Screen is blank
•
Check circuit breaker and reset if necessary.
•
Make sure power switch at heating & cooling system is on.
•
Make sure furnace door is closed securely.
No response to
key presses (or
temperature
will not
change)
•
Make sure the thermostat is not locked (see page 14).
Make sure heating and cooling temperatures are set to acceptable ranges:
•
Heat: 40° to 90°F (4.5° to 32°C).
•
Cool: 60° to 99°F (15.5° to 37°C).
Screen is
difficult to read
•
To adjust the screen display, see backlight options in the Preferences
menu (see page 16).
•
At 2 am each day, Prestige HD models change screen colors for an hour,
to prevent burn-in. Touch the screen at any time to restore normal
screen colors.