Troubleshooting
Screen is blank
Screen is
difficult to
read
Heating or
cooling system
does not
respond
Temperature
settings do not
change
"Cool On" or
"Heat On" is
flashing
• 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 only battery powered, make sure the batteries are fresh and
correctly inserted.
• Change screen brightness in thermostat Menu. Increase brightness
intensity for inactive backlight of the thermostat screen (max. is level
5). Setting is only available if thermostat is AC powered
• Touch Mode to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
• Touch Mode 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.
Your installer may have set a range stop setting for heat or cooling.
Contact your installer to verify the range stop settings on the
thermostat. Default range stops settings are:
• Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
• Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
• Compressor protection feature is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor (see
page 8).
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