Troubleshooting - Honeywell Home Lyric T6 Pro Wi-Fi Professional Install Manual

Troubleshooting
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 • Change screen brightness in thermostat Menu. Increase brightness intensity for
to read inactive backlight of the thermostat screen (max. is level 5).
Heating or • Touch Mode to set system to Heat. Make sure the temperature is set higher than
cooling system the Inside temperature.
does not respond • 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.
Heat runs with • Verify there is not a wire attached to W for heat pump systems. See wiring on
cooling pages 5-6.
Alerts and reminders
Alerts and reminders are displayed via the alert symbol and alert number in the clock
area on the home screen. You can read more information about active alerts, snooze
or dismiss non-critical alerts in Menu/Alerts.
Number Alert/Reminder Definition
164
Heat Pump Needs
Service
Heat pump needs service. Contact dealer to diagnose
and service heat pump.
168 Wi-Fi Radio Error
Wireless module is not operating. Wireless features
are not available. Please contact dealer to replace the
thermostat.
170
Internal Memory Error The memory of the thermostat has encountered an
error. Please contact dealer for assistance.
171
Set the Date and Time
Set the date and time on your thermostat. The date and
time are required for certain features to operate, like the
program schedule.
173
Thermostat
Temperature Sensor
Error
The sensor of the thermostat has encountered an error.
Please contact dealer to replace the Thermostat.
175
AC Power Resumed
AC power resumed to thermostat after power loss.
177
Indoor Temperature
Sensor Error
Wired indoor temperature sensor is not connected
or there is a wiring short. Please contact dealer for
assistance.
178
Outdoor Temperature
Sensor Error
Wired outdoor temperature sensor is not connected
or there is a wiring short. Please contact dealer for
assistance.
181
Replace Air Filter (1)
Replace air filter (1). Reset the timer by touching
the "dismiss" button on thermostat screen after it is
replaced.
18