12-16-2022 12:22 PM
My home has electric heat radiators that have a White-Rodgers controller. It controls 240 volt heaters. The thermostat wire/power is 24volt (.2 amp) and looks to be AC but I cannot find any documentation saying either. I installed the Nest E thermostat. It set up and did updating, but has since registered a N260 error code. That seems to be wanting the Nest Power Connector. After surfing google and other sites, it appears the red and white wires go into the connectors which tie into the power connector at "W*Y" and "R." The power connector connects to the thermostat with the C wire along with the "W*Y" and "R."
It seems odd that the 23 volt lines from the controller do not have enough power to support the Nest Thermostat. :^(
I've ordered the power connector via Amazon (Sunday and today is Friday) because google is more than a week to deliver.
12-22-2022 02:27 PM
Thanks for reaching out. The Nest Thermostat requires a C wire to operate. Let us know once you receive your Nest Power Connector.
12-22-2022 03:13 PM
Hi Edward, with all due respect, I'm disagree with that. My nest t-stat has been functioning with limited capabilities. When I first set it up and had connectivity, I set up a daily schedule for daytime and overnight temps. It has been following those schedules. I did see the Nest t-stat was receiving voltages from 24 volts to 25 volts.
That being said, I received a replacement Nest Power Connector (courtesy of Google support). I will try to see if the replacement resolves the issue.
If it does not, I would start to think the thermostat itself is defective.
Of course, we are heading to extremely cold conditions tomorrow and through the holiday weekend.
12-22-2022 04:04 PM
i Edward, I've installed the Nest Power Connector and it still generates an error code E260. I opted to go to diagnostics to "check power." The screen says it may turn the heat on. So far it has been testing for 15 minutes, and as best as I can tell, the heat has not cycled on. It does say that it is getting 24.787 . Lin: 10(w). PS: W-219
12-28-2022 03:58 PM
Thanks for the response. We'd like to know more about this. Please fill out this form so we could investigate further.
12-28-2022 06:48 PM
Hi Edward, I'll try to be brief. But the Nest Power Connector and, more importantly, were semi useless. I did have the t'stat doing rudimentary operations, it set the schedule (7:30 AM at 71°) for comfort heat and 10:00 PM for sleep at 65°). Outside of that, nothing changed status such as the installations for the Power Connector. I ended up getting a 24 volt supply and fed that into the t'stat ganging together the red wires. I picked up all this from an Amazon review. The person was dead on and correct. My Nest t'stat is seeing voltages and has connectivity. I can control remotely and see status.
Here's what the guy in the Amazon review wrote:
I replaced my two wire old mercury thermostat （which is for heating system only no cooling） with Google nest and since then I kept getting notice about power issues and thermostat got disconnected with WiFi often.
After consulting a hvac professional, I realized that installing a c wire is really expensive, so I decided to get this c wire adapter instead. B
ut the instruction is printed in a tiny font in black and white, there's no way to read. Luckily I found the wiring graph on Amazon in the item description.
But my Google nest only has one R but there are Rh and Rc in the graph. I tried to disconnect the R of Google nest and kept it hanging there unused and connected the black wire of this adapter to R. Google nest showed no power issue any more but when I adjusted the temperature, thermostat showed heating while the furnace didn't work.
I had to watch several videos and finally figured it out. Connect both black wire from the adapter and the R wire from the thermostat together to R and connect red wire of the adapter to C, keep W wire of thermostat connecting to W.
Google nest may then show warning of wire information about unrecognized wire. Reset Google nest to manufacturing default and delete it from Google home App. Follow the instruction of home App to reinstall Google nest thermostat and when choosing the connected wire, check W, R, C.
Now there's no issue or warning any more and Google nest is fully functional. I can control the temperature any time anywhere. First picture is the wiring after adapter installation and second picture is the wiring of Google nest thermostat only without the adapter. Hope it could help people with the similar issues.
01-04-2023 06:36 PM
Thanks for the response. I checked your case and our team is already investigating the issue. I would suggest that we continue our conversation there as there are information that we can't share here. Please be advised that this thread will be locked after 24 hours.