ComfortNET CTK04 - In Case of Difficulty; Troubleshooting

ComfortNet™ Communicating Thermostat
33
69-2687EFS— 03
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 change the screen brightness or color, see backlight options in the Preferences
menu (see page 20).
• At 2 am each day, the ComfortNet™ CTK04 communicating thermostat changes
screen color for an hour, to prevent burn-in. Touch the screen at any time to restore
pre-set screen colors.
Heating
or cooling
system does
not respond
• Press SYSTEM to set system to Heat. Make sure the temperature is set higher than
the Inside temperature.
• Press SYSTEM 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.