Nest Thermostat with Bosch Furnace

[Alton1965]

I have connected my Next Thermostats and now my heat will not shut off.  I have a Bosch furnace for water and house heat.  The only way to turn the heat off is to disconnect the wire.   

[Markjosephp]

Hello Alton1965,

I understand that you're facing an issue with your Nest Thermostats causing the heat to not shut off, and you've resorted to disconnecting the wire to stop it. Let's work together to find a solution.

Here are a few troubleshooting steps you can try:

1. Ensure that your Nest Thermostat is set to the desired temperature and mode (heating or cooling) correctly. Sometimes, incorrect settings can cause the system to run continuously.
2. Double-check the wiring connections to ensure they match the recommended configuration for your furnace and Nest Thermostats. Any loose or incorrectly connected wires could disrupt the proper functioning of the system.
3. Share with us a photo of your old thermostat and Nest Thermostat's wiring setup.
4. Gather the power readouts in the Technical Info settings.

Keep us posted.

Best regards,
Mark