Honeywell TH8320ZW Manuale Utente

If you have difficulty with your thermostat, please try the following suggestions.  
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.

•  Check to make sure the thermostat is not locked (see page 17).
•  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)

•  If thermostat is AC powered, a dim display is normal. The backlight 

remains on at a low level, and brightens when a key is pressed.

•  This indicates that the coin cell battery has drained out. Replace the 

coin cell battery immediately.