https://www.googlenestcommunity.com/t5/Nest-Thermostats/Wiring-question/m-p/473171#M102260 <P>Hello ClydeM,<BR /><BR />Thanks for posting here in the Community. Based on the photos of the wires from your current thermostat, this is a proprietary system. This is not compatible with any type of Nest Thermostat.&nbsp;However, some proprietary systems can be&nbsp;<A href="https://goo.gle/2KfNYjV" target="_blank">rewired by a pro installer</A> to be compatible.&nbsp;Check out this link for&nbsp;<A href="https://goo.gle/47KDcLL" target="_blank">Nest thermostat compatibility</A>.</P> <P>&nbsp;</P> <P>Let me know if you have additional questions.</P> <P>&nbsp;</P> <P>Best regards,<BR />Edmond</P> Fri, 25 Aug 2023 02:39:17 GMT EdmondB 2023-08-25T02:39:17Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Wiring-question/m-p/471316#M101869 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="71418654756__6E2AB0E3-5A3C-46FF-80B1-B2380D0C3F5C.jpeg" style="width: 4032px;"><img src="https://www.googlenestcommunity.com/t5/image/serverpage/image-id/28127iFCD5B5A85C54C8E7/image-size/medium/is-moderation-mode/true?v=v2&amp;px=400" role="button" title="71418654756__6E2AB0E3-5A3C-46FF-80B1-B2380D0C3F5C.jpeg" alt="71418654756__6E2AB0E3-5A3C-46FF-80B1-B2380D0C3F5C.jpeg" /></span></P><P>This is my old set up….am I still able to use a nest since it does not have E1 and E2 wires?&nbsp;</P> Sun, 20 Aug 2023 02:45:48 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Wiring-question/m-p/471316#M101869 Jwit10 2023-08-20T02:45:48Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Wiring-question/m-p/473171#M102260 <P>Hello ClydeM,<BR /><BR />Thanks for posting here in the Community. Based on the photos of the wires from your current thermostat, this is a proprietary system. This is not compatible with any type of Nest Thermostat.&nbsp;However, some proprietary systems can be&nbsp;<A href="https://goo.gle/2KfNYjV" target="_blank">rewired by a pro installer</A> to be compatible.&nbsp;Check out this link for&nbsp;<A href="https://goo.gle/47KDcLL" target="_blank">Nest thermostat compatibility</A>.</P> <P>&nbsp;</P> <P>Let me know if you have additional questions.</P> <P>&nbsp;</P> <P>Best regards,<BR />Edmond</P> Fri, 25 Aug 2023 02:39:17 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Wiring-question/m-p/473171#M102260 EdmondB 2023-08-25T02:39:17Z