Jump to User Manual and Installation Guide
Up to 3 Heat/2 Cool Heat Pump Systems
Up to 2 Heat/2 Cool Conventional Systems
Installation Video
How to install when No C wire exists for Honeywell Wifi Thermostat
FAQ
Frequently asked questions
Q: Will my thermostat still work if I lose my Wi-Fi connection?
A: Yes, the thermostat will operate your heating and/or cooling system with or without Wi-Fi.
Q: How do I find the password to my router?
A: Contact the manufacturer of the router or check the router documentation.
Q: Why am I not seeing my Wi-Fi setup page?
A: You are probably connected only to your router, not to your thermostat. Try connecting to the
thermostat again.
Q: Why isn’t my thermostat connecting to my Wi-Fi router even though it is very close to the
thermostat?
A: Verify that the password entered for the Wi-Fi router is correct.
Q: Where can I find my MAC ID and MAC CRC codes?
A: The MAC ID and MAC CRC numbers are included on a card packed with the thermostat or
on the back of the thermostat (visible when removed from wallplate). Each thermostat has a
unique MAC ID and MAC CRC.
Q: My thermostat is unable to register to the Total Connect Comfort website.
A: Verify that the thermostat is correctly enrolled on your home Wi-Fi network. The message
center will display Wi-Fi Setup or Register at Total Connect. You might also see the Wi-Fi
Signal strength icon. Verify that the Wi-Fi router has a good internet connection. On your
computer, verify that
you can open the site at mytotalconnectcomfort.com
If you cannot open the site, switch off the internet modem for a few seconds, then power it
back on.
Q: I registered on the Total Connect Comfort website but was unable to login using my new
account.
A: Check your email and ensure that you received an activation email. Follow the instructions to
activate your account and then login to the website.
Q: I have signed up on the Total Connect Comfort website and have not received a
confirmation email.
A: Check for the email in your Junk or Deleted folder.
Q: Is there a way to extend the signal strength?
A: Most standard routers can be set up to be a repeater. You can also purchase and install a
Wi-Fi repeater.
Troubleshooting
Lost Signal
If the no-Wi-Fi indicator displays in place of the Wi-Fi strength indicator in the upper right hand corner of the home screen:
• Check another device to be sure Wi-Fi is working in your home; if not, call your Internet Service Provider.
• Move the router.
• Restart the thermostat: remove it from the wallplate, wait 10 seconds, and snap it back onto the wallplate. Return to Step 1 of Connecting to your Wi-Fi network.
Error Codes
For certain problems, the thermostat screen will display a code that identifies the trouble. Initially, error codes are displayed alone in the time area of the screen; after a few minutes, the home screen is displayed and the code alternates with the time.
E01 During Wi-Fi Setup, the router lost power.
• Ensure your router has power.
• If trying to connect to a hidden or manually added network, confirm the router has power and is working.
E02 Invalid Wi-Fi password. This code displays for 30 seconds, then the thermostat will re-enter Wi-Fi Setup mode.
• Re-enter password for your home Wi-Fi network.
• Repeat setup process and confirm your password for your home Wi-Fi network.
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 10).
• 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 10).
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.
Display 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.
• Make sure C wire is connected (see page 6).
Cannot change system setting to Cool
• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 18).
Fan does not turn on when heat is required
• Check Function 3: Heating Fan Control to make sure it is set to match your heating equipment (see page 18).
Cool On or Heat On is flashing on the screen
• Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.
Heat pump issues cool air in heat mode, or warm air in cool mode
• Check Function 2: Heat Pump Changeover Valve to make sure it is properly configured for your system (see page 18).
Heating or cooling system does not respond
• Press System to set system to Heat. Make sure the temperature is set higher than the Inside temperature.
• Press System 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.
• Wait 5 minutes for the system to respond.
Heating system is running in cool mode
• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 18).
Heating and cooling equipment are running at the same time
• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 18).
• Grasp and pull thermostat away from wallplate. Check to make sure bare wires are not touching each other.
• Check thermostat wiring is correct.
