Replacing Lennox iComfort Wi-Fi thermo with Nest Learning thermo

[Ravenray]

Nest is running me around in circles. Won't accept changes. Lennox wires were : Red to R, Blue to C, White to i+, Green to i-, Yellow is not used. Is Nest compatible to this setup? Do you know where to place the i wires to the Nest?

[mejiacruz]

Hi @Ravenray,

I understand your frustration, circles can be quite dizzying! It sounds like you're having trouble figuring out Nest thermostat compatibility with your Lennox system's wiring. Let's see if I can help.

To best assist you, I'll need a closer look at your current thermostat's wiring. Would you be able to take a picture of the wires connected at the back of your Lennox thermostat? That way, I can check the specific wire labels and placement to see how they translate to Nest's terminals.

Also you can go to this link to check the compatibility by yourself.

Regards,

Josh

[Ravenray]

Hello, Josh

Had to call my HVAC tech to install Nest. He installed a Faststat- wire multiplier- to make it work. it's running now. Needed it to work ASAP as the temp today will be 105F, in the sunny central valley of CA. Thanks for the response. Ray

[mejiacruz]

Hi @Ravenray,

I’m so glad to know that you were able to get the Nest Thermostat working properly, specially when today we are having that temperature.

If for any reason you need additional assistance, don't hesitate to reply to this post and we will be more than happy to assist you.

Regards,

Josh