|thermostat wiring diagram for gas furnace||0.91||0.3||108||25|
Most thermostat systems have two wires. One is red, the other is white. Strip the casing ¼ inches from both ends of both wires. Install the white wire on the thermostat and the furnace terminals that say "W.". Connect the red wire to the thermostat and the furnace at the terminals that are marked "R.".How do I change a furnace thermostat?
Give your furnace and air conditioner at least 5 minutes each time to activate. If the thermostat does not work properly, retrace your steps to see where you made a mistake. You may need to hit the reset button on your new thermostat. Some will not start until this button is pushed.How do you wire a furnace?
Run the thermostat wire from your furnace to the location where your thermostat will hang. Drill a hole in the drywall, and use a fishtape to feed the wire from the furnace through the hole in the wall. The wire will run through a dedicated opening on the side of the furnace into the control panel.