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Nest Thermostat connecttion

tonyt123
Community Member

I installed the power connector and have the 3 wires to connect...BUT, the plugs on the nest thermostat have :

G, R, and OB....the 3 wires from the nest power connector are for: R, W, and C........!? how do I do this?

7 REPLIES 7

txredbird59
Community Member

I need to know if my system is compatable. Here is a pic of behind my thermostat. I do know it is a 2 stage system.

 

thumbnail_PXL_20230104_214455438.jpg

Houptee
Silver Product Expert
Silver Product Expert

What brand of Tstat is that?

It looks like a proprietary type for your heating system.

E1 E2 is probably the communication wires that it sends data to the heating system.

If you go to the furnace and take off the cover look on the back of cover for decal with the wiring info.

You might be able to use a Nest or standard Tstat if there are terminal screws for R W C G in the furnace.


Houptee -- NJ Master HVAC Licensed Contractor

Houptee
Silver Product Expert
Silver Product Expert

You put the power connector in the furnace not on the Nest.

Do you have pics of the old Tstat and the Nest the way you wired it?


Houptee -- NJ Master HVAC Licensed Contractor

Markjosephp
Community Specialist
Community Specialist

Hello folks,


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

 

Thanks for helping here, @Houptee.

 

Regards,

Mark

Hi there,

 

I'm checking back in — how's it going? Still need our help? Let us know so we can assist you right away.

Thanks,

Mark

Hello there,

 

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