Honeywell THX9321 ユーザーズマニュアル

If you have difficulty with your thermostat, please try the suggestions below. Most 
problems can be corrected quickly and easily. 

•  Check circuit breaker and reset if necessary.
•  Make sure power switch at heating & cooling system is on.
•  Make sure furnace door is closed securely.

•  To change the screen brightness or color, see backlight options in the Preferences menu 

(see page 21).

•  At 2 am each day, Prestige thermostats change screen colors for an hour, to prevent burn-

in. Touch the screen at any time to restore pre-set screen colors.

•  Press 

 to set system to Heat. Make sure the temperature is set higher than the 

Inside temperature.

•  Press 

 to set system to Cool. Make sure the temperature is set lower than the 

Inside temperature.

•  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 “Waiting For Equipment” is displayed, the compressor protection timer is on. Wait 5 

minutes for the system to restart safely, without damaging the compressor.