topic Re: Nest Power Connector Problem in Nest Thermostats

Nest Power Connector Problem

RobertNorth — Thu, 24 Mar 2022 19:56:53 GMT

I installed the nest thermostat on a 2 wire system and had the N260 error message. I then installed the nest power connector to solve the error message now I am receiving the N261 error message. I checked the voltages and have 25vac on the input to the power connector and 25 vac between the C and R wires but nothing between the R and W wires and nothing between the C and W . The thermostat does not detect the W wire . I don’t know and cannot find what I should measure between the R and W or the C and W wires. Can anyone please help.

Re: Nest Power Connector Problem

Patrick_Caezza — Thu, 24 Mar 2022 22:36:18 GMT

What type of 2-wire system are you trying to set up?

Re: Nest Power Connector Problem

RobertNorth — Fri, 25 Mar 2022 00:28:25 GMT

It is an oil fired hot water baseboard with a Honeywell controller on the NTI boiler

Re: Nest Power Connector Problem

RobertNorth — Fri, 25 Mar 2022 15:23:45 GMT

Do you have a nest power connector unit if so could you please measure the voltages between all wires of the output and let me know what you measure

Re: Nest Power Connector Problem

Patrick_Caezza — Sat, 26 Mar 2022 03:53:08 GMT

Good chance you will need to add an external 24VAC transformer.

Here is an example of what I am talking about.

Re: Nest Power Connector Problem

RobertNorth — Wed, 30 Mar 2022 16:09:16 GMT

Thank you for your help. I gave up on the thermostat and returned it. I will look for one that will work without the ancillary equipment that the nest requires.

Re: Nest Power Connector Problem

MelbaDT — Wed, 06 Apr 2022 11:30:05 GMT

Hey folks,

Thanks for providing the diagram and for answering, Patrick_Caezza.

RobertNorth, sorry that you had to go through this and we're sad to see you go. Should you be willing to give us a chance again in the future, you know where to find us.

Best,

Melba

Re: Nest Power Connector Problem

MelbaDT — Tue, 12 Apr 2022 05:58:54 GMT

Hey there,

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