https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E-and-Rh-Rc-jumper-compatible/m-p/600122#M117235 <P>Nest Thermostats don't use jumper wires, so don't enter that into the Nest app during setup (i.e., don't select that you have an RC wire, just enter the RH wire). Looking at your wiring, it should be compatible. You won't see an option for a B/C wire. For your setup, it looks like that wire is a&nbsp;C (common) wire as you don't have a separate C terminal, the colour is blue, and you already have an O wire on a separate terminal. If you're unsure, I'd recommend checking your thermostat's manual if you still have it or look for it online to confirm.</P> <P><STRONG><A href="https://support.google.com/googlenest/answer/9250973" target="_blank">Learn about thermostat jumper wires - Google Nest Help</A><BR /><A href="https://store.google.com/intl/en_us/widget/compatibility/thermostat/" target="_blank">Thermostat Compatibility - Google Store</A><BR /></STRONG></P> Sun, 25 Feb 2024 14:58:00 GMT David_K 2024-02-25T14:58:00Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E-and-Rh-Rc-jumper-compatible/m-p/599789#M117202 <P>Here is an image of my current thermostat wiring.&nbsp;<BR /><BR /><SPAN>what goes where and is this compatible with my Nest E 1st Generation?</SPAN></P><P>&nbsp;</P><P><BR />most is self-explanatory but the jumper has me thinking it’s not compatible with my system.&nbsp;<BR /><BR /></P><P>can anyone clarify?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="16C4E96B-614A-461B-A437-AEC2B48226D1.jpeg" style="width: 4032px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/51567i37F5D63A99BA14A6/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="16C4E96B-614A-461B-A437-AEC2B48226D1.jpeg" alt="16C4E96B-614A-461B-A437-AEC2B48226D1.jpeg" /></span></P> Sat, 24 Feb 2024 17:59:54 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E-and-Rh-Rc-jumper-compatible/m-p/599789#M117202 aragno 2024-02-24T17:59:54Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E-and-Rh-Rc-jumper-compatible/m-p/600122#M117235 <P>Nest Thermostats don't use jumper wires, so don't enter that into the Nest app during setup (i.e., don't select that you have an RC wire, just enter the RH wire). Looking at your wiring, it should be compatible. You won't see an option for a B/C wire. For your setup, it looks like that wire is a&nbsp;C (common) wire as you don't have a separate C terminal, the colour is blue, and you already have an O wire on a separate terminal. If you're unsure, I'd recommend checking your thermostat's manual if you still have it or look for it online to confirm.</P> <P><STRONG><A href="https://support.google.com/googlenest/answer/9250973" target="_blank">Learn about thermostat jumper wires - Google Nest Help</A><BR /><A href="https://store.google.com/intl/en_us/widget/compatibility/thermostat/" target="_blank">Thermostat Compatibility - Google Store</A><BR /></STRONG></P> Sun, 25 Feb 2024 14:58:00 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E-and-Rh-Rc-jumper-compatible/m-p/600122#M117235 David_K 2024-02-25T14:58:00Z