https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Learning-Thermostat-Compatibility/m-p/670672#M131139 <P><a href="https://www.googlenestcommunity.com/t5/user/viewprofilepage/user-id/642941">@rwherrmann</a>&nbsp;</P> <P>Your thermostat wires are a stranded wire and also you’ll probably find that your system is operating at 120 V AC. Nest thermostat only operate on a 24 V AC. &nbsp;Use a multimeter, set it on AC voltage and measure the voltage between the R and the C and see what you get.&nbsp;<BR /><BR /></P> <P>AC Cooling Wizard</P> Sat, 18 Jan 2025 23:18:31 GMT CoolingWizard 2025-01-18T23:18:31Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Learning-Thermostat-Compatibility/m-p/670649#M131132 <P>Wondering if this wiring setup works with latest Nest Learning Thermostat?</P><P>&nbsp;</P><P><A href="https://photos.app.goo.gl/cV11vV2wi1cBVg7j9" target="_self">https://photos.app.goo.gl/cV11vV2wi1cBVg7j9</A>&nbsp;</P> Sat, 18 Jan 2025 20:23:43 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Learning-Thermostat-Compatibility/m-p/670649#M131132 rwherrmann 2025-01-18T20:23:43Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Learning-Thermostat-Compatibility/m-p/670672#M131139 <P><a href="https://www.googlenestcommunity.com/t5/user/viewprofilepage/user-id/642941">@rwherrmann</a>&nbsp;</P> <P>Your thermostat wires are a stranded wire and also you’ll probably find that your system is operating at 120 V AC. Nest thermostat only operate on a 24 V AC. &nbsp;Use a multimeter, set it on AC voltage and measure the voltage between the R and the C and see what you get.&nbsp;<BR /><BR /></P> <P>AC Cooling Wizard</P> Sat, 18 Jan 2025 23:18:31 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Learning-Thermostat-Compatibility/m-p/670672#M131139 CoolingWizard 2025-01-18T23:18:31Z