Is Google Nest thermostat compatible with my hot water heating system?

[Dougman]

Old Honeywell ThermostatB, R, and W leads. No C wire

[listairee]

Hello @Dougman,

Thanks for reaching out. Have you tried using the following compatibility checker: Compatibility Checker? Also, from your image, it looks like the wire colors doesn't match the lettering.

[Dougman]

Thank you for your response. I've used the compatibility checker and it directs me to take a photo but never gets to a point where I can upload for assistance. That's why I tried the community board. Also, I did notice that the wires do not match the lettering but the system has been functioning properly for the five years since I bought the home. This stat controls only the hot water heating system and I thought it would be nice to upgrade it and have remote access to system with an app. Note: There is one of these connected for each of the 4 heating zones in the home. A separate unit and thermostat are used for cooling.

[Jenelyn_O]

Hi there,

Thanks for reaching out. I'm sorry for the delay. In what country are you located? 

I appreciate your help, @listairee.

Best,

Jenelyn

[Dougman]

Indiana, USA. I am still not sure if the Nest is going to work for me.

[Jenelyn_O]

Hey Dougman,

Thanks for the quick update. Could you please provide the make and model of your Honeywell thermostat as well with your heating system? 

Regards,

Jenelyn

[Dougman]

The two photos I posted with my original query are the best I can do for model of thermostat. I is original to the home from 1960's. The heating system is a gas-fired, hot water boiler system by American Standard also from the 60's. There are 4 heating zones in the home with a thermostat for each zone. Hope this helps!

[zoeuvre]

Hi Dougman, 

I wanted to stop by and see how I could help.

Please send us a photo of your hot water system's control panel where the other end of your thermostat wires are connected so we can better check for its compatibility with our Nest Thermostats.

Thanks for the help here, @listairee and Jenelyn.

Best, 

Zoe

[Dougman]

I am trying to upload a couple of photos but it tells me I'm not authorized to add photos? Any ideas how I can get those pics to you?

[zoeuvre]

Hi there, 

Thanks for getting back to us. Are you replying to us via the Google Community website? If not, go to this link, then hit Reply, then look for the camera icon or the three horizontal dots to view more options, and check if the camera icon is there where you can insert photos to your reply. 

Regards, 

Zoe

[Dougman]

The Honeywell box is difficult to reach and there are screws to take the cover off, or open it. If you need to see inside that box I will figure out how to get to it. Thanks!

[zoeuvre]

Hey there, 

Thanks for the follow-up information. In the meantime, we'll leave this thread open while we are waiting for your response. Let us know if you are still having any questions, as we would be happy to take a closer look and assist you further.

Best regards,

Zoe 

[zoeuvre]

Hey folks, 

@Dougman, How's it going with your Nest Thermostat? I wanted to check and see if you are still in need of any help. Please let me know, as I would be happy to assist, and answer any questions you may have.

Thanks, 

Zoe

[zoeuvre]

Hey Dougman, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you run into any more issues in the future, please feel free to create a new thread.
 

Regards,

Zoe