Wiring for my Nest Learning Thermostat

[Tim1250]

I have an all electric a/c heating air forced unit and I'm trying to figure out the wiring.  On my old thermostat, I had the R = Red      1+ = White     1- = Blue    C = Orange

On the nest thermostat, where do these wires go?  

Thanks.

[Houptee]

The + and - are data wires for a communicating thermostat that talks to the furnace.

To use a Nest or any other standard thermostat you would need to go to the equipment and move the wires over to the terminal strip that has the standard labels on each screw. Such as Y G W R C. And also on the outside unit you would have to move the wires.

If you take the cover off the indoor unit there is usually a decal with wiring diagram showing the thermostat wiring for communicating and standard thermostats.

[Tim1250]

Thank you for your expert reply.  

[Markjosephp]

Hello folks,

I wanted to ensure that everything was covered here.

You're a big help here, @Houptee. Thanks for helping!

@Tim1250, I hope you've got the answer you're looking for. If you're still in need of any assistance, feel free to let us know.

Thanks,

Mark

[EdwardT]

Hi Tim1250,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[Tim1250]

Edward,

Thanks but I’m not sure if the Lennox would run fully with the the Nest Thermostat.  I have read that the Lennox might be limited when running the Nest thermostat.

The wires, on the Lennox HVAC, would need to be changed on the unit to reflect the changes needed on the Nest Thermostat.  But again, not sure if it would fully work the Lennox HVAC.  What is the cost of having that done by a professional Heating/Cooling company?

My Lennox thermostat is 10f81 and not the S30, which I have read was an update version of the 10f81.  I know people have had problems with the 10f81 thermostat.  I called Lennox and they will not replace the 10f81 with the S30 as my unit is out of warranty.   If it was under warranty, I'd still have to pay for the technician to do the work.

Question:  Can the Next thermostat after rewiring on the Lennox unit give full funcationality to the Lennox HVAC?

[EdwardT]

Hi Tim1250,

Thanks for the response. I would suggest checking our Nest Pro services to get your HVAC system physically checked. 

Thanks,

Edward

[EdwardT]

HI Tim1250,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[Markjosephp]

Hello Tim1250,

I'm checking in to make sure that you've seen our response. Please let us know if you have any additional questions or concerns before we lock this thread in 24 hours. 

Regards,

Mark

[Tim1250]

My one question:  If I have a Lennox HVAC that is using their thermostat, can I change it over to a Google Nest Learning thermostat and have fun functionality of my Lennox HVAC?  The reason I am asking is two fold:  1)  I heard the thermostat I have now does tend to malfunction over time; and 2)  I read that the Google Nest Learning Thermostat cannot give fun functionality to the Lennox HVAC.  Thanks. 

[Markjosephp]

Hi there,

I know it has been a while, and I'm sorry for the delay.

To ensure your systems' compatibility with the Nest Thermostats, could you please share with us your thermostat's wiring? This is to ensure how wires are being labeled.

I'll look forward to your response.

Regards,

Mark

[Jake]

Hey there,

I wanted to check in 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.

Best regards,
Jake

[EmersonB]

Hey everyone,

@Georgerb, just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, we would be happy to keep it open. If there's more we can do, just let us know.

I appreciate the help, Houptee, Mark, Edward and Jake.
  
Best,
Emerson