topic Re: Compatible? - Straight Answer - W and R cable only on Current Unit in Nest Thermostats

Compatible? - Straight Answer - W and R cable only on Current Unit

SilasofNj — Wed, 07 Dec 2022 04:15:15 GMT

I have a Honeywell Home unit, which uses a W and R cable hookup. (see attached picture.)

The R is jumpered with the RC cable. (Not sure if that's actually needed with a Nest.)

I have a free standing until downstairs. Nothing in the wall or floor.

Is the Nest actually compatible?

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

CoolingWizard — Wed, 07 Dec 2022 05:50:29 GMT

You original thermostat you are have there is a low voltage thermostat. It works on 24 Volts Alternating Current. The power arrives at the thermostat on the R wire. You are correct in that the jumper wire between Rc and R will not be needed with a Nest Thermostat. When a thermostat determine that Heat is needed, it connects the R to the W. The voltage travels on the W wire to the heating system. This voltage on W starts the heating cycle.

What type of Heating system do you have? Can you take a picture of it and it’s manufacturer label showing the model number?

Ken, The AC Cooling Wizard

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

SilasofNj — Wed, 07 Dec 2022 06:22:50 GMT

Thanks for the response. (see below)

If this will work with Nest, I will purchase this bad boy tonight!

Thanks.

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

CoolingWizard — Fri, 09 Dec 2022 01:39:14 GMT

That is a forced air gas furnace and that is fully compatible with an Nest Thermostat.

Ken

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

SilasofNj — Fri, 09 Dec 2022 05:58:41 GMT

Sweet! Thanks Ken. Just purchased my unit! Thanks for your help!

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

Markjosephp — Sun, 11 Dec 2022 18:02:23 GMT

Hi there,

Thanks for assisting here, Ken. Big help!

@SilasofNj, I know it has been a while but I wanted to ensure that everything is covered here. Please let us know if you have any other questions or concerns.

Regards,
Mark

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

SilasofNj — Tue, 13 Dec 2022 04:02:44 GMT

I'll let you know once my Nest Arrives Dec 15th. Can't wait to install this guy. Company paid 75% of it. Hard not to resist!

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

Markjosephp — Tue, 13 Dec 2022 22:54:50 GMT

Hi SilasofNj,

Sounds exciting! Thanks for the update. Please keep us updated on how the installation goes, and we'd love to hear the outcome.

Best,

Mark

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

EdwardT — Fri, 16 Dec 2022 23:49:10 GMT

Hi SilasofNj,

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 trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

Re: Compatible? - Straight Answer - W and R cable only on Current Unit

Markjosephp — Sun, 18 Dec 2022 17:45:17 GMT

Hello SilasofNj,

I'm checking in to make sure that you've seen our response. If you have any further questions or concerns, please let us know before we lock this thread in 24 hours.

Regards,

Mark