topic Re: How to replace the existing Honeywell Thermostat with Nest Thermostat in Nest Thermostats

How to replace the existing Honeywell Thermostat with Nest Thermostat

VigneshSan — Wed, 24 Aug 2022 21:36:31 GMT

We have just moved into a new place and am looking to make the home "Smart" starting with the thermostats.

These are the Honeywell knob type for floor board heaters (only heating-electric, no cooling). How do I go about replacing them? The wires aren't as malleable as shown in most of the YouTube videos. There are only 2 wires connected to "L" and "T" that's it. I don't see any other alphabets or wires elsewhere to connect. They seem like 12 gauge wires cuz I stripped atleast 1 of them to replace a few LED bulbs. Am very confused.

I have New Nest Thermostat with a mirror like face (not the costly sibling or the Nest-e). No videos are able to help my cause. Please help. 😞

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

VigneshSan — Wed, 24 Aug 2022 21:40:02 GMT

** Update

I tried to connect the 2 wires to "R" and "W" but doesnt seem to power on the Thermostat. Not sure if it is only cuz it needs the "C" cable or if I just fried my nest. 😐

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

Jake — Tue, 30 Aug 2022 19:07:53 GMT

Hey VigneshSan,

I wanted to follow up and see I could be of any help. Sorry to hear about the trouble you are having. Do you mind me asking if your system is 24V system? I found an article with more details on system compatibility. Please let me know if that helps, or if you have any questions from here.

Best regards,

Jake

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

VigneshSan — Tue, 30 Aug 2022 20:09:12 GMT

Thanks, Jake. How do I confirm this? I do not have any place on the wire or elsewhere that clearly states this. Is there somewhere I can look for this?

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

Jake — Wed, 31 Aug 2022 17:34:11 GMT

Hey VigneshSan,

Taking a closer look at the article above, there is a chance you may have a high voltage system which is not compatible. These systems are usually connected using wire nuts, like the pictures you have sent above. If you review your thermostat currently installed, it should have more details on what voltage your system uses. If you are wanting to install a Nest Thermostat, I would recommend contacting an HVAC professional. They would be able to install a step-down transformer to 20-30V. I hope that helps.

Best regards,

Jake

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

Ryan_G — Sun, 04 Sep 2022 15:54:59 GMT

Hey everyone,

I'd like to jump in here and check if you've seen Jake's response. Let us know if you need more help by replying to this thread.

Thank you for your help, Jake.

Regards,
Ryan

Re: How to replace the existing Honeywell Thermostat with Nest Thermostat

MelbaDT — Tue, 06 Sep 2022 09:18:15 GMT

Hi,

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

Best,

Melba