topic Re: Help wiring compatiblity in Nest Thermostats

Help wiring compatiblity

Klpdgtt — Mon, 18 Apr 2022 17:05:56 GMT

Help I have 3 w wires w1 w2 w3 and humidifier.
I have w1 plugged in and w2&w3 wired together into w2/aux and humidifier plugged into * spot.

I don’t have gas only electric I have a heat pump system.
The heat pump is plugged into ob.

Will this work ok? It’s telling me It’s dual heat source, but I don’t have 2 heat sources? Just electric?

Re: Help wiring compatiblity

Klpdgtt — Mon, 18 Apr 2022 17:09:01 GMT

this is the old system

Re: Help wiring compatiblity

Patrick_Caezza — Tue, 19 Apr 2022 00:23:46 GMT

With multi-stage heat like you have, the 2nd and 3rd heat sources are what makes it a Dual Fuel system, It doesn't matter if it is all-electric.

Try this

Black - W3 to * (set to W3)

Brown - W2 to W2/AUX ( set as AUX heat)

White - W1 to W1

Green - G to G

Yellow Y1 to Y1

Blue - O to OB

Red - RC tp Rc (jumper to RH and AUX1 not needed)

Red - AUX1 - not used

White - AUX1 - not used

Re: Help wiring compatiblity

MelbaDT — Sat, 23 Apr 2022 06:13:56 GMT

Hey folks,

I appreciate your complete answer, Patrick_Caezza.

Klpdgtt, I'm chiming in to ensure everything is covered here. Feel free to reply to this thread if you still have some questions.

Best,

Melba

Re: Help wiring compatiblity

Klpdgtt — Sat, 23 Apr 2022 12:22:47 GMT

I had to have someone come out and wire it, they said I didn’t need the 3 stage and changed the wiring. Hopefully that doesn’t cause any issues. It does seem to be working now thankfully.

Re: Help wiring compatiblity

MelbaDT — Thu, 28 Apr 2022 03:48:50 GMT

Hey there,

Thanks for keeping us posted and we're glad that you've got it working again with the help of a technician. Feel free to let us know if you need anything else.

Best,

Melba

Re: Help wiring compatiblity

MelbaDT — Thu, 28 Apr 2022 03:50:19 GMT

Hi,

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best,

Melba