Google Nest Community

eva1028 · 05-20-2023

I am trying to convert my old thermostat to Nest Learning Thermostat. After connecting the wires based on a Youtube video, Nest will not power on. I used an external wire to power it on and Nest gave an E79 error code. Currently use the Blue wire (wh...

eva1028 · 05-26-2023

Hi Zoe:As I mentioned in the previous thread, we tried to tie all blue lines together and all green lines together. Current setting provides:* Battery: 3.908VOC: 31.59VIN : 31.59IIN: 200mA(c)

eva1028 · 05-25-2023

Thank you for reaching out. We tried the method from @CoolingWizard. Our blue line is already in the B/C spot. We tried to switch the blue line to under C but still not enough power to turn on Nest. We looked at all the wires that tied together and f...

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Need to figure out what to do with S1 and S2. Can I use one of that to be C wire?

Re: Need to figure out what to do with S1 and S2. Can I use one of that to be C wire?

Re: Need to figure out what to do with S1 and S2. Can I use one of that to be C wire?