topic Navien ncb-250 in Nest Thermostats

Navien ncb-250

Rsalz7575 — Mon, 21 Nov 2022 15:43:31 GMT

Heat won’t turn off, I wired a two wire system first and it didn’t power the nest so I switched to 3 wire R W and C now it runs but dose not turn off.

Re: Navien ncb-250

Rsalz7575 — Mon, 21 Nov 2022 16:25:16 GMT

Re: Navien ncb-250

Markjosephp — Thu, 24 Nov 2022 21:52:25 GMT

Hello Rsalz7575,

I'm sorry for the trouble this may have caused you — let's see what's going on.

It appears that your thermostat is experiencing a power issue. To isolate:

Is this a first-time installation?
If you pull the Nest off of its base, does the boiler shut off?
Has your HVAC system recently been changed or upgraded?
When was the last maintenance check for your HVAC system?
Please gather the power and wire info from the thermostat equipment settings.

I'll look forward to your response.

Best regards,

Mark

Re: Navien ncb-250

Markjosephp — Mon, 28 Nov 2022 19:27:52 GMT

Hi there,

Checking back in — how's it going? Still need our help? Let us know so we can assist you right away.

Thanks,

Mark

Re: Navien ncb-250

Markjosephp — Tue, 29 Nov 2022 23:13:24 GMT

Hi Rsalz7575,

I'm just checking in to make sure that you've seen my response. Please let us know if you have any additional questions or concerns before I lock this thread in 24 hours.

Best regards,

Mark