Honeywell Lyric T6 Pro Troubleshooting Manual

Screen is blank

• 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.

Screen is difficult to read

• Change screen brightness in thermostat Menu. Increase brightness intensity for inactive backlight of the thermostat screen (max. is level 5).

Heating or cooling system does not respond

• 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.