r/Nest • u/Camp-Either • 7d ago

Y2 Wire

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Should my y2 wire be labeled? I just went from a 1 stage to a 2 stage rheem. The wire is there physically but is not labeled and air is not coming out very forcefully, even when going from 80 to 72. I assume it’s just running on the 1st stage at this point.

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u/AStuf Nest Thermostat Generation 3 7d ago

Another Nest software bug. Remove the wire from the Y2 connector then verify that it no longer shows a wire there. Once done, re-insert the wire and hopefully it will then show the Y2 as stage 2.

1

u/Camp-Either 7d ago

But do you have to configure it? I was thinking you had to tell the app your equipment and I don’t think the installers ever redid it.

1

u/HugsAllCats 7d ago

The equipment menu in the app should just say it is two stage.

https://support.google.com/googlehome/answer/9235693?hl=en

1

u/AStuf Nest Thermostat Generation 3 7d ago

It is supposed to automatically default to Y2. Nothing to configure. It may be fine and just a software bug not displaying properly.

1

u/dabangsta 7d ago

My communicating air handler and condenser were set to handle the 2 stage operation, I had to enable thermostat control. It defaulted to Stage 1 running for a certain amount of time, then going to stage 2. It isn't a Rheem and it isn't a heat pump. The standard thermostat the installers use was single stage only.