https://www.googlenestcommunity.com/t5/Nest-Thermostats/2-wire-system/m-p/84460#M18834 <P>I have a 2 wire thermostat that controls my infloor heat. Can I just use the 2 wires or do I need to put a transformer in?</P> Sat, 15 Jan 2022 19:26:21 GMT Snappy 2022-01-15T19:26:21Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/2-wire-system/m-p/84460#M18834 <P>I have a 2 wire thermostat that controls my infloor heat. Can I just use the 2 wires or do I need to put a transformer in?</P> Sat, 15 Jan 2022 19:26:21 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/2-wire-system/m-p/84460#M18834 Snappy 2022-01-15T19:26:21Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/2-wire-system/m-p/87646#M19653 <P>Firstly, You best check if your system is compatible for your Nest thermostat.&nbsp;</P><P>If it is compatible: The Nest Thermostat i have required a "C" wire,a third wire,&nbsp; even tho "C" wire&nbsp; was suppose to be optional.</P> Wed, 19 Jan 2022 19:54:05 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/2-wire-system/m-p/87646#M19653 BertG 2022-01-19T19:54:05Z