Honeywell Rth6500wf Wiring Diagram Honeywell RTHB/E1 RTHB/A 1 Wee $$ to run this wire. (This diagram summarizes a thermostat survey's findings. Honeywell RTHWF Wi-Fi Series Manual Online: Connect Wires. a Starting with the C Wire, match the sticky tag on the wire to the terminal labelsywell Rthwf Wiring Diagram wiring diagrams honeywell uk heating controls contains all the How to Wire a Honeywell Thermostat | Hunker The wiring for your Honeywell thermostat depends on the functions of your heating and cooling system. You'll probably see a thermostat jumper wire connecting the Rc and Rh terminals. It's there so you can supply power to the heating and cooling switches with a single wire, which is usually red.Author: Chris Deziel Rth6580WF Wiring Help - thermostatforums I am getting ready to purchase a new thermostat since we just bought a new house and have the old circular manual dial type and were hoping to upgrade to a digital one. I want to be able to control the thermostat when I am away from the house with my phone so I was looking at purchasing the Honeywell RTH6580WF1001W but noticed you have to have thermostat c wire - I am installing a Honeywell RTH6580WF I am installing a Honeywell RTH6580WF with a TACO SR504. Ask Question Asked 5 years, Have you checked the wiring diagrams The third wire will go from the common terminal at the 24VAC terminal in the controller to the C terminal in the thermostat. Honeywell's customer service gave me a different configuration that did not work.