lrningtheropes
Jan 5, 2009, 09:22 PM
I'm a single girl and new homeowner, so please bear with me :)
I currently have a Honeywell dial thermostat, and just received a Honeywell RTH230B programmable thermostat, which says it works for 2-, 3-, 4-, or 5-wire installations.
When I took the old thermostat off the wall, there were 6 wires: W (white), Y (yellow), G (green), R (red, two wires, but it looked like one was not connected to anything), B (red).
I have two questions:
1) Do I need the 2nd R wire (that didn't appear connected)? If so... where would it connect on the new thermostat? Or will the new thermostat not work for me?
2) All the letters on the wires on the old thermostat match the instructions for the new thermostat, except the B and R wires. Which is heating power supply (Rh in the instructions) and which is cooling power supply (Rc in the instructions)?
Thanks in advance for any guidance!
I currently have a Honeywell dial thermostat, and just received a Honeywell RTH230B programmable thermostat, which says it works for 2-, 3-, 4-, or 5-wire installations.
When I took the old thermostat off the wall, there were 6 wires: W (white), Y (yellow), G (green), R (red, two wires, but it looked like one was not connected to anything), B (red).
I have two questions:
1) Do I need the 2nd R wire (that didn't appear connected)? If so... where would it connect on the new thermostat? Or will the new thermostat not work for me?
2) All the letters on the wires on the old thermostat match the instructions for the new thermostat, except the B and R wires. Which is heating power supply (Rh in the instructions) and which is cooling power supply (Rc in the instructions)?
Thanks in advance for any guidance!