topic Re: Nest wire connections error 77. in Nest Thermostats

Nest wire connections error 77.

Denis007 — Mon, 13 Jun 2022 21:32:05 GMT

Hello,

i connected the wire that my previous thermostat had to the Google nest and I’m getting a error 77 message. Asking me to connect the heater pump, require wire Y1 to be connected. However I do not have a heater pump. Only baseboard heater.

any suggestions?

Denis

Re: Nest wire connections error 77.

Patrick_Caezza — Tue, 14 Jun 2022 01:28:12 GMT

Post a picture of the original thermostat's wiring and one of how you wired the Nest

Re: Nest wire connections error 77.

Denis007 — Tue, 14 Jun 2022 11:45:25 GMT

I can’t, I get a message telling me I do not have permission to upload images???

Re: Nest wire connections error 77.

Denis007 — Tue, 14 Jun 2022 11:50:51 GMT

Re: Nest wire connections error 77.

Denis007 — Tue, 14 Jun 2022 11:52:01 GMT

Was finally able to do it. Let me know what I can do.

Re: Nest wire connections error 77.

Denis007 — Tue, 14 Jun 2022 18:21:04 GMT

@Patrick_Caezza wrote:
Post a picture of the original thermostat's wiring and one of how you wired the Nest

Hi Patrick, any suggestions on how I can make the Nest work?

Re: Nest wire connections error 77.

Patrick_Caezza — Wed, 15 Jun 2022 04:41:40 GMT

Looking at the original thermostat's wiring, I'm not sure it's compatible. What is the manufacturer and model number of that thermostat? Can you provide a better picture of the label?

What are you controlling? A/C, Furnace, Heat Pump, Boiler?

Your current wiring of the nest won't work.

Re: Nest wire connections error 77.

Denis007 — Wed, 15 Jun 2022 11:22:15 GMT

Thanks Patrick,

it only control baseboard heater. Nothing else.

ill be back at the location this weekend, I’ll send you a better picture then.

Denis

than

Re: Nest wire connections error 77.

Denis007 — Sat, 18 Jun 2022 11:57:53 GMT

Hi Patrick,

I still cannot post a picture.

Denis

Re: Nest wire connections error 77.

Denis007 — Sat, 18 Jun 2022 12:00:28 GMT

Re: Nest wire connections error 77.

Denis007 — Wed, 22 Jun 2022 15:23:46 GMT

Hello Patrick,

Any idea on how I can make this Nest work?

Denis

Re: Nest wire connections error 77.

MelbaDT — Fri, 08 Jul 2022 02:09:25 GMT

Hey Denis,

Sorry for the delay here and thanks for the photos.

Since you don't have a heat pump, there shouldn't be a wire on the OB terminal. Could you transfer the black wire to the C terminal instead as on the old thermostat labels, one is labeled as C.

Keep us posted.

Also, thanks for your help here, Patrick.

Best,

Melba

Re: Nest wire connections error 77.

Denis007 — Sat, 09 Jul 2022 22:03:50 GMT

Good morning Patrick.
looks like it works. Fantastic. Thank you very much sir really appreciated your help.
so I guess in the future for the other nest that I will install (baseboard), I have to follow the same connections I assume?
Denis

Re: Nest wire connections error 77.

Denis007 — Tue, 12 Jul 2022 03:00:10 GMT

Thanks Melba for your help.

denis

Re: Nest wire connections error 77.

MelbaDT — Wed, 13 Jul 2022 04:51:02 GMT

Hey Denis,

No biggie and we're glad to hear you've got it working as it should. And to answer your question above, yes, you just need to wire the other Nest thermostat as what you've done here.

Feel free to reach out again should you have further questions.

Cheers,

Melba

Re: Nest wire connections error 77.

MelbaDT — Sat, 16 Jul 2022 06:06:56 GMT

Hi,

We haven't heard from you in a while so we'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