Nest N72 Error Code How to fix instructions
In this video we explain in step-by-step instructions how we fix the Error Code N72 on our Nest Thermostat.
In this case we are working with a 3rd generation Nest, which is also powered by an external 24 volt AC power supply, which is connected to the C and Rc port of the Nest.
The trick is to install a jumper wire between the two R ports. This will clear the N72 error code and the thermostat will start to properly work again.