Wall Furnace Thermostat Wiring

If you don t have a c wire.

Wall furnace thermostat wiring.

A new or improved thermostat can help increase energy efficiency when running your furnace or air conditioner. Check the area behind the thermostat to see if a c wire was tucked into the wall by your electrician or the installer. You may find that a c wire connection and lead is present. Read on for thermostat wiring instructions.

If we recommend placing a wire in a terminal do not move it to another terminal if we address it later in the guide. Run the thermostat wire from your furnace to the location where your thermostat will hang. For example if the red wire is connected to w on the thermostat the furnace should turn on. Mount the thermostat base on the wall using the screws included with the thermostat.

Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. The wire will run through a dedicated opening on the side of the furnace into the control panel. Use these tips to wire a. After mounting the new thermostat s wall plate we can re connect the wiring.

The main trouble is dealing with those different colored wires knowing which one does what and if that wasn t enough you also have numbers and letters to deal with. Programmable and standard thermostats are installed the same way. A thermostat turns your furnace and air conditioner on or off depending on the temperature in the room and the setting on the thermostat. All thermostats whether powered or not have the r wire or a red wire if your thermostat wiring follows the proper protocol and this red wire is the 24 volts of power needed to control the air conditioner air handler or furnace plus it can feed the t stat power if the 24 volt circuit is completed at the t stat.

Tighten any loose wire connections and make sure the wires and sheathing are in good condition. Heck now i m not calling anyone a dummy. The opening should have a rubber sleeve to. Thermostat wiring for dummies.

After you have removed and labeled all wires you can unscrew remove the old thermostat wall plate and mount the new thermostat s wall plate. Wiring connections for a room thermostat such as the honeywell 24 volt t87f the honeywell series 10 out of production or penn rimset low voltage wall thermostat models are pretty simple as are the wiring instructions for white rogers mercoid general controls and similar thermostats. The transformer is usually located near the heating and air conditioning system or inside of a furnace access panel. Drill a hole in the drywall and use a fishtape to feed the wire from the furnace through the hole in the wall.