Troubleshooting
Error Code
E42
Router is not issuing
an IP address to the
thermostat.
E43
No internet connection.
Thermostat cannot
communicate to Total
Connect Comfort.
E99
General error
69-2803ES—03
Action
• Wait for 30 minutes, connection can
take several minutes.
• If still no connection, remove
thermostat from wallplate for 10
seconds, then reconnect it (see page
26).
• Verify your router is correctly setup to
automatically give IP addresses.
• Make sure the Internet cable is
plugged in.
• Reboot the router.
Remove thermostat from wallplate for
10 seconds, then reconnect it (see page
26).
60
M33998