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Nest thermostat wiring for 2-stage heating with W1 and W2 wires

Community Member

I have an old Lux thermostat, which has 6 wires including both  W1 and W2 wires. I have bought a google nest thermostat which only have 1 W connector. How shall I connect the W1 and w2 wires to it? Shall I replace it with a nest learning thermostat?


Silver Product Expert
Silver Product Expert

As long as you do not have a Heat Pump you can put the W2 in the O/B* terminal.

Then during setup you have to tell the Nest that OB* is stage 2 heat (not a heat pump).

This will not work if you have a heat pump as the OB* will be needed for heat pump wire.

Houptee -- NJ Master HVAC Licensed Contractor

Community Specialist
Community Specialist

Hey folks, 

We appreciate your help here, Houptee.
aarzho, 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 concerns or questions from here, as I would be happy to take a closer look and assist you further.


Hello there,


Thanks for assisting, Mel.


@aarzho, I'm checking back in — how's it going? Have you had a chance to install your Nest Thermostat 2020? Please let us know if you need more help.



Hello aarzho,


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.