18
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.
Troubleshooting
Number Alert/Reminder Definition
164 Heat Pump Needs
Service
Heat pump needs service. Contact dealer to diagnose
and service heat pump.
168 WiFi 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.
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.
Alerts and reminders
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