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69-2718ES—01
60
Troubleshooting
M33998
Error Code
Action
E42
Router is not issuing
an IP address to the
thermostat.
• 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.
E43
No internet connection.
Thermostat cannot
communicate to Total
Connect Comfort.
• Make sure the Internet cable is
plugged in.
• Reboot the router.
E99
General error
Remove thermostat from wallplate for
10 seconds, then reconnect it (see page
26).
69-2718ES_A.indd 60
8/13/2012 3:01:51 PM