topic Can a G4cvz model wiring issue in Nest Thermostats https://www.googlenestcommunity.com/t5/Nest-Thermostats/Can-a-G4cvz-model-wiring-issue/m-p/74111#M16551 <P>I've got a propane boiler for heat only, my old thermostat is a Honeywell mercury dial style with a red and white. Do I need a power wire or with the existing wire work? I received a n260 code. If not how long do the batteries last? Thanks</P> Sat, 01 Jan 2022 17:28:06 GMT Jgvt 2022-01-01T17:28:06Z Can a G4cvz model wiring issue https://www.googlenestcommunity.com/t5/Nest-Thermostats/Can-a-G4cvz-model-wiring-issue/m-p/74111#M16551 <P>I've got a propane boiler for heat only, my old thermostat is a Honeywell mercury dial style with a red and white. Do I need a power wire or with the existing wire work? I received a n260 code. If not how long do the batteries last? Thanks</P> Sat, 01 Jan 2022 17:28:06 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Can-a-G4cvz-model-wiring-issue/m-p/74111#M16551 Jgvt 2022-01-01T17:28:06Z