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Troubleshooting
If you have difficulty with your thermostat, try these suggestions. Most problems can
be corrected quickly and easily.
Screen is blank
Screen is
difficult to read
Red light is on
Heating or
cooling system
does not
respond
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA alkaline batteries are
installed correctly (see page 32).
• Change screen brightness using Preferences menu (see page 26).
• If thermostat is in Emergency Heat mode, the red light is normal. It shows
that the thermostat is in Emergency Heat mode.
• If thermostat is not in Emergency Heat mode, an alert is active. Check
message on the thermostat screen.
SYSTEM
• Touch
to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
SYSTEM
• Touch
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 "Wait" is displayed, the compressor protection timer is on. Wait 5 minutes
for the system to restart safely, without damaging the compressor.
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