topic Nest Thermostat - Wire Not Detected in Nest Thermostats

Nest Thermostat - Wire Not Detected

osborneb3 — Thu, 04 Aug 2022 15:23:45 GMT

Having a "W-Not Detected" issue on a new install. The heat pump (orange) from original thermostat was connected to the W/OB and I have attached it to the "OB" on the Nest and the white wire that was connected to the W2/Aux on prior thermostat is attached to the "W" on the Nest.

Any Suggestions? The AC is kicking on, but the blower/fan does not appear to be functioning properly. Should the white and the orange be switched?

Re: Nest Thermostat - Wire Not Detected

MelbaDT — Thu, 11 Aug 2022 06:32:39 GMT

Hey osborneb3,

Thanks for the photos and for reaching out to the Google Nest Community.

It seems that you have a dual fuel system. This is sometimes called a hybrid or packaged system which is a combination of a heat pump for primary heating and cooling, and a furnace (usually gas or oil) that provides a second and/or third stage of heating.

If you do, you will need to have a trained professional set up your thermostat. It’s important for a professional to assess the requirements for your specific dual fuel configuration since choosing incorrect options for a dual fuel system can result in damage to your system. Please contact a local pro.

Best,

Melba

Re: Nest Thermostat - Wire Not Detected

Ryan_G — Sun, 14 Aug 2022 13:31:34 GMT

Hey everyone,

I'd like to jump in here and check if you've seen Melba's response. Let us know if you need more help by replying to this thread.

Thank you for your help, Melba.

Regards,
Ryan

Re: Nest Thermostat - Wire Not Detected

osborneb3 — Sun, 14 Aug 2022 21:14:57 GMT

Thank you, appreciate the response

Re: Nest Thermostat - Wire Not Detected

MelbaDT — Tue, 16 Aug 2022 01:26:27 GMT

Hey there,

You're welcome. We'll consider this thread as resolved and we'll be locking it after a 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