Troubleshooting; Alerts And Reminders - Honeywell Lyric T6 Pro Wi-Fi Professional Install Manual

Troubleshooting

Screen is
blank
Screen is
difficult to
read
Heating
or cooling
system does
not respond

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
164 Heat Pump Needs
Service
168 Wi-Fi Radio Error
170 Internal Memory Error
171 Set the Date and Time
173 Thermostat
Temperature Sensor
Error
175 AC Power Resumed
177 Indoor Temperature
Sensor Error
178 Outdoor Temperature
Sensor Error
• 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.
• Change screen brightness in thermostat Menu. Increase
brightness intensity for inactive backlight of the thermostat
screen (max. is level 5).
• 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.
Definition
Heat pump needs service. Contact dealer to diagnose
and service heat pump.
Wireless module is not operating. Wireless features
are not available. Please contact dealer to replace the
thermostat.
The memory of the thermostat has encountered an
error. Please contact dealer for assistance.
Set the date and time on your thermostat. The date and
time are required for certain features to operate, like the
program schedule.
The sensor of the thermostat has encountered an error.
Please contact dealer to replace the Thermostat.
AC power resumed to thermostat after power loss.
Wired indoor temperature sensor is not connected
or there is a wiring short. Please contact dealer for
assistance.
Wired outdoor temperature sensor is not connected
or there is a wiring short. Please contact dealer for
assistance.
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