Filter
Top Products
Operating Manual
20
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.