Google Nest Community

Charles333 · 10-19-2022

I had a previous post which has got stale. "Is W2 an input to nest or an ouput?" (missing the 't')Jake reached out to see if everything was solved - and I did not respond in time.I will not repeat that post here - because there was a LOT - and it not...

Charles333 · 08-10-2022

I know W2 is a call for heat when the heat pump cannot cut it. But who is asserting the signal? It is not obvious.

Charles333 · 11-14-2022

Hi Mel,I was looking for confirmation of my thinking. I am surprised there has been so little interest.I started this whole process by trying to understand whether the W and W2 signals were bi-directional. I have never gotten an answer from Nest.I am...

Charles333 · 08-12-2022

Hopefully final tidbit. W from the Heat Pump is used during the defrost cycle.So it seems one would connect all W, W1 and W2 lines at the Heat Pump (call the result triple-W); connect the triple-W from the Heat Pump to the W for the Heat Source (furn...

Charles333 · 08-12-2022

You most likely do not have a heat pump and the Y2 is for your air conditioner.And yes, the Nest will be compatible once you get the C line sorted out.

Charles333 · 08-11-2022

Peter, the other end of the C wire must have been mis-wired. Usually the 24AC (R) and it's common (C) come directly from a 120VAC to 24AC transformer. Bringing R and C from the transform will work (unless the transformer is bad/overloaded).

Charles333 · 08-11-2022

Certainly a common is preferred. I would start by giving the current bundle at your thermostat a good tug. There is a chance there are more unused wires.If not, it is true there is a fair chance it would be alright without one. Got a voltmeter? Measu...

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W2 for Heat Pump Balance

Is W2 an input to nest or an ouput?

Re: W2 for Heat Pump Balance

Re: Is W2 an input to nest or an ouput?

Re: 5 wires? Compatible?

Re: 5 wires? Compatible?

Re: 5 wires? Compatible?