topic Re: C wire hook up on the TACO box in Nest Thermostats https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/66158#M14976 <P>Install the new transformer and was still getting low power on C wire. If I go ahead and install the second transformer I just took out I would put spare thermostat wire to c on transformer. Do I need to hook anything up to R/load&nbsp; transformer ? This is starting to drive me nuts but I'm determined to figure it out.. or just throw in the towel. ,<span class="lia-unicode-emoji" title=":thinking_face:">πŸ€”</span><span class="lia-unicode-emoji" title=":thinking_face:">πŸ€”</span> Thanks again for all your assistance it really is greatly appreciated</P> Sat, 18 Dec 2021 16:28:21 GMT Thekideo 2021-12-18T16:28:21Z C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48382#M10600 <P>I have an existing thermostat running on two wires with batteries and I want to replace it with a nest thermostat that requires a C wire. I do have a third wire available to me I just need to know where to hook it up on the TACO Box</P> Sun, 21 Nov 2021 17:58:27 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48382#M10600 BrokenOldBottle 2021-11-21T17:58:27Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48556#M10654 <P>There is a C connection hub, typically located on the left hand side of your Taco, it might also say 24V. What is the exact model of your Taco control module?</P> Mon, 22 Nov 2021 05:39:27 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48556#M10654 laurentbourg 2021-11-22T05:39:27Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48637#M10675 <P>Thank you I'll pull the cover off and check which model I have but I think that answers my question</P> Mon, 22 Nov 2021 13:22:05 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/48637#M10675 BrokenOldBottle 2021-11-22T13:22:05Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/57634#M12835 <P>I have an older system two wire. I have no circuit board. Has Honeywell RA832A with (3) zone valves. transformer on top of 832. I have extra wires not being used in my thermostat&nbsp; &amp; was planning on using one of the for my "C" wire. Just not sure where to connect on furnace side? wasn't sure if i should hook to transformer&nbsp;</P> Mon, 06 Dec 2021 17:17:32 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/57634#M12835 Thekideo 2021-12-06T17:17:32Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/57690#M12851 <P>Please upload pictures of your setup</P> Mon, 06 Dec 2021 17:44:52 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/57690#M12851 laurentbourg 2021-12-06T17:44:52Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58085#M12935 <P>Looks like a mess but it's a pretty straightforward mess.lol bear with me I'm trying to figure out how to upload my pictures</P> Mon, 06 Dec 2021 23:06:46 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58085#M12935 Thekideo 2021-12-06T23:06:46Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58091#M12938 <P>you just click on the picture icon available in the textbox when you reply</P> Mon, 06 Dec 2021 23:08:49 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58091#M12938 laurentbourg 2021-12-06T23:08:49Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58095#M12940 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_225839471.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3003i9E205EA421783E3F/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_225839471.jpg" alt="PXL_20211206_225839471.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:10:35 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58095#M12940 Thekideo 2021-12-06T23:10:35Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58098#M12941 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_225805529.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3004iC37C6506836A826C/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_225805529.jpg" alt="PXL_20211206_225805529.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:10:58 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58098#M12941 Thekideo 2021-12-06T23:10:58Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58101#M12942 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_225812447.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3005i3BCE318546AE28F6/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_225812447.jpg" alt="PXL_20211206_225812447.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:11:24 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58101#M12942 Thekideo 2021-12-06T23:11:24Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58112#M12948 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_225805529.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3007iE8C12C32DD1EE45B/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_225805529.jpg" alt="PXL_20211206_225805529.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:15:52 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58112#M12948 Thekideo 2021-12-06T23:15:52Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58115#M12950 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_225812447.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3008iD01CD4F216C23917/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_225812447.jpg" alt="PXL_20211206_225812447.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:16:42 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58115#M12950 Thekideo 2021-12-06T23:16:42Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58117#M12952 <P>I called TACO in Rhode island and Steve in Tech Support walked me right thru it.</P> Mon, 06 Dec 2021 23:17:07 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58117#M12952 BrokenOldBottle 2021-12-06T23:17:07Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58124#M12954 <P>I have reviewed your pics, and confirmed you should be able to tap the C wire on your 24v &nbsp;transformer that is on top of your RA832 controller, connect it where the white wire is connected.&nbsp;</P> Mon, 06 Dec 2021 23:19:24 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58124#M12954 laurentbourg 2021-12-06T23:19:24Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58127#M12955 <P>Hopefully my pictures went through. When I take the cover off the junction box it looks like all the whites are twisted together. I had an extra wire behind my thermostat not being used I was going to make that my c wire. Just wasn't sure where to do the hook up by the furnace</P> Mon, 06 Dec 2021 23:20:57 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58127#M12955 Thekideo 2021-12-06T23:20:57Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58133#M12958 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_232220457.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3012i3C675AC1D720237E/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_232220457.jpg" alt="PXL_20211206_232220457.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:23:05 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58133#M12958 Thekideo 2021-12-06T23:23:05Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58137#M12960 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="PXL_20211206_232229582.jpg" style="width: 3024px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3013iB464A50810D373DA/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="PXL_20211206_232229582.jpg" alt="PXL_20211206_232229582.jpg" /></span></P><P> </P> Mon, 06 Dec 2021 23:23:38 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58137#M12960 Thekideo 2021-12-06T23:23:38Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58151#M12965 <P>Connected directly to the white wire on the transformer or follow the white wire off the transformer</P> Mon, 06 Dec 2021 23:27:37 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58151#M12965 Thekideo 2021-12-06T23:27:37Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58166#M12968 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1638833732845356965659236681161.jpg" style="width: 4032px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/3014i0F2097FB3F16FC68/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="1638833732845356965659236681161.jpg" alt="1638833732845356965659236681161.jpg" /></span></P><P> this comes off the transformer I have 19 volts here but I have 24 across the transformer</P> Mon, 06 Dec 2021 23:36:07 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58166#M12968 Thekideo 2021-12-06T23:36:07Z Re: C wire hook up on the TACO box https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58167#M12969 <P>connected directly to the white wire on the transformer. It is a 24V transformer, correct?</P> Mon, 06 Dec 2021 23:36:07 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/C-wire-hook-up-on-the-TACO-box/m-p/58167#M12969 laurentbourg 2021-12-06T23:36:07Z