topic Re: Assistance with “c” wire Nest in Nest Thermostats https://www.googlenestcommunity.com/t5/Nest-Thermostats/Assistance-with-c-wire-Nest/m-p/98539#M21883 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" style="width: 1280px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/5132iC840D273B4D03ED1/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" alt="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" /></span></P><P> </P> Fri, 04 Feb 2022 04:24:00 GMT Soccerdog0203 2022-02-04T04:24:00Z Assistance with “c” wire Nest https://www.googlenestcommunity.com/t5/Nest-Thermostats/Assistance-with-c-wire-Nest/m-p/98536#M21881 <P>Attached is the wiring of my system. I am attempting to upgrade my thermostat to a nest. My thermostat only has a “r” and a “w” wire. The nest thermostat said I required a “c” wire. There is a wire already run to my boiler but I am having trouble. I assumed “c” should be connected to the 24v ground on the control unit, but the nest still does not see power on the c wire. I read 18vac between r and c. &nbsp;I verified the wiring of the boiler is correct. What am I missing? &nbsp;Note: do it yourselfer, with some experience in electrical systems.&nbsp;</P> Fri, 04 Feb 2022 04:20:50 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Assistance-with-c-wire-Nest/m-p/98536#M21881 Soccerdog0203 2022-02-04T04:20:50Z Re: Assistance with “c” wire Nest https://www.googlenestcommunity.com/t5/Nest-Thermostats/Assistance-with-c-wire-Nest/m-p/98539#M21883 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" style="width: 1280px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/5132iC840D273B4D03ED1/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" alt="C673B8FB-63B0-4D9F-BA3C-1ABCF3ACA4CC.jpeg" /></span></P><P> </P> Fri, 04 Feb 2022 04:24:00 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Assistance-with-c-wire-Nest/m-p/98539#M21883 Soccerdog0203 2022-02-04T04:24:00Z