northerngmc
Well-known member
I have a furnace/thermostat question for you. I want to install a Honeywell wifi thermostat in the house here. It requires a c wire for constant power.
The old thermostat is a basic Mercury 2 wire but there are 3 wires running between the furnace and thermostat. The instructions say there should be a connection block on the furnace but the 2 wires go directly onto the circuit board on the Reillo BF 5 burner. I can't see where I would hook the 3rd wire to a c connection. Any ideas or thoughts ?
The old thermostat is a basic Mercury 2 wire but there are 3 wires running between the furnace and thermostat. The instructions say there should be a connection block on the furnace but the 2 wires go directly onto the circuit board on the Reillo BF 5 burner. I can't see where I would hook the 3rd wire to a c connection. Any ideas or thoughts ?
