I have a IComfort (lennox thermostat) I want to change out with a nest

[DFedosoff]

I have 4 wires coming out of the thermostat C i+ i- R and have to put them into the 6 slots.  I have seen other forums saying you don't need all 6 wires to be hooked up.  I can put the C and R in their spots but where do I put the i+ and i- wires ( I have Y W G and OB left?

[sporfrog]

Unfortunately, it looks like that could be a proprietary or "communicating" thermostat. The clue in your case is the i+ and i- which are not standard terminal indicators. As such the HVAC system may not be compatible with Nest Thermostats.

A picture of the old thermostat with wiring connected may help confirm it.

Read the link above to verify for your system.

[DFedosoff]

Hired a professional HVAC person at $180/hr to connect but it works great -only used 4 wires 

[Xe]

Could you please tell us how that was done?  A photo perhaps or just a good description.  I would like to do the same.

thanks

[eethan9043]

can you share the photos of installation to # or please add a google photo link with those photos. It would be great if you can do that as lennox is a terrible system with very less information available about the thermostat compatibility and it is very expensive also.

i have updated the firmware of my lennox icomfort wifi thermostat and next day onward it is showing a white screen . Luckily i am able to control it via mobile app but i want to fix it or replace it with google nest

[Ryan_G]

Hey folks,

Thanks for visiting the Google Nest Community. 

Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.

If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand. 

Hope this helps!

Kind regards,

Ryan

[MelbaDT]

Hey folks, 

Thanks for answering, sporfrog.

DFedosoff, thanks for posting. I'm glad to hear that you've managed to have one of our Nest thermostats work with your system. Feel free to let us know if you have more questions, we'll just be here. 

Best, 

Melba