Google Nest Community

The nest power connector that interfaces with the zone controller doesn't work with all boiler setups. Please check your individual system before purchasing. The Venstar ACC0436 two wire kit does work with all boiler setups and is easy to install.

I had the same problem... I sent that transformer back and purchased https://www.supplyhouse.com/Venstar-ACC0436-Two-Wire-Kit. This worked perfectly.

N260 error? Need a common wire? If you have radiant (in-floor, baseboard, or radiator) heating, and you only have one red wire and one white wire at your current thermostat. You need to purchase a Venstar ACC04############-Wire Kit to connect up your...