topic Re: Nest Thermostat to Honeywell EIM in Nest Thermostats

Nest Thermostat to Honeywell EIM

Nohartiii — Thu, 29 Dec 2022 10:40:34 GMT

I want to replace my Honeywell thermostat that is only connected using 3 wires; Red, White and green to a nest thermostat. My gas furnace also has a heat pump. The thermostat wire runs from my thermostat to a Honeywell EIM. The wires are connect to ports labeled 1,2,3 on the EIM and thermostat. unlike normal lettering in other thermostats.

Please let me know if you have any suggestions.

Re: Nest Thermostat to Honeywell EIM

David_K — Mon, 02 Jan 2023 18:54:43 GMT

This Reddit post contains some info which reads to be useful for your situation:

Bypassing Honeywell Equipment Interface Module (HIM) for Nest Thermostat : Nest

Re: Nest Thermostat to Honeywell EIM

aatienza — Mon, 02 Jan 2023 22:25:52 GMT

Hey Nohartiii,

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

I appreciate the help, davidking.

Thanks,

Archie

Re: Nest Thermostat to Honeywell EIM

aatienza — Fri, 06 Jan 2023 01:30:57 GMT

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have.

Thanks,

Archie

Re: Nest Thermostat to Honeywell EIM

aatienza — Wed, 11 Jan 2023 00:04:26 GMT

Hello there,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.

Thanks,

Archie

Re: Nest Thermostat to Honeywell EIM

Nohartiii — Wed, 11 Jan 2023 09:46:42 GMT

Thank you I have found that the Nest E will not work with the Honeywell EIM without losing the benefits of the system. The Nest Learning Thermostat 3rd Generation will be able to run my HVAC system.

Re: Nest Thermostat to Honeywell EIM

Jhonleanmel — Wed, 11 Jan 2023 17:25:57 GMT

Hi folks,

Nohartiii, awesome — glad to hear that your query is cleared. It looks like we can consider this one complete, so I will lock the thread shortly unless I can help out with anything else.

Best,
Mel