Operating Manual

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.

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.

No response to

• Make sure the thermostat is not locked (see page 14).

key presses (or

Make sure heating and cooling temperatures are set to acceptable ranges:

temperature

• Heat: 40° to 90°F (4.5° to 32°C).

will not

change)

• Cool: 60° to 99°F (15.5° to 37°C).

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