Old system have seven wires white for auxiliary black for emergency
heat. 4th generation does not have a place for emergency heat just
auxiliary. Confused where the white and black wire goes
My old thermostat has 7 wires. A white wire for auxiliary a black wire
for emergency heat. The Nest does not have a slot for emergency Heat.
Can someone assist. White wire is hooked up to Nest auxiliary error code
no power
