Air conditioner with an electric furnace 4 wires for single stage and 5 wires for two stage. Use this option to replace virtually any two wire or four wire line voltage wall mounted electric heating thermostat. You ll probably see a thermostat jumper wire connecting the rc and rh terminals.
In this case we chose to give up control of the fan to power our honeywell wi fi t stat.
This manual thermostat s versatility is increased substantially with its implementation of a 2 or 4 wire non polarized connection. It s economical yet rugged. Digital thermostats normally require a power source unless they have a battery backup. Loosen the screws on the terminal block with the phillips jeweler s screwdriver.
