How do I Install White-Rodgers Thermostat Type No. 1F86-344?


Whether you want increased control over your heating and cooling system, or you are replacing a broken thermostat, a White-Rodgers 1F86-344 thermostat provides a clean and efficient way of controlling your indoor climate. With just a few tools, you can remove an old thermostat if needed and install the White-Rodgers 1F86-344.

Things You'll Need

  • Screwdriver
  • Small level
  • Sharp pencil
  • Scratch awl
  • Shut off the electricity for the device (such as a furnace or boiler, for example) at the main panel.

  • If applicable, remove the old thermostat cover. Do not disconnect the wires from the thermostat mounting plate.

  • Remove the old mounting plate from the wall by removing any necessary screws.

  • Identify each wire and its location on the old thermostat. Label each wire if needed using the labels provided with the White-Rodgers 1F86-344.

  • Disconnect each wire one at a time from the old thermostat, being careful not to let the wires slip back through the hole in the wall.

  • Pull the cover off the new thermostat. Prying or forcing could damage the thermostat.

  • Slip the thermostat wires from the back through the hole in the new thermostat and connect each wire to its corresponding screw terminal.

  • Position the mounting plate against the wall and over the wiring hole. Ensure the wire is not being pinched between the wall and the thermostat.

  • Level the thermostat along the bottom edge. Use the pencil to mark two spots on the wall for the mounting screws (provided with the White-Rodgers 1F86-344, along with two plastic wall anchors).

  • Move the base out of the way. Push the tip of the scratch awl into the wall at each pencil mark. Push and gently wiggle the scratch awl to make a hole sized for the plastic wall anchors to fit snug.

  • Push each wall anchor into the holes. Tape each anchor lightly with the handle of the screwdriver to ensure a tight fit.

  • Position the thermostat mounting base over the anchor locations and secure using the provided screws. Level the thermostat before tightening the screws (leveling the White-Rodgers 1F86-344 is strictly for aesthetics and does not affect performance).

  • Configure the gas/electric switch on the thermostat front in you have electric heat, or if your system requires the thermostat to control fan operation. The 1F86-344 comes factory configured for gas forced-air heat.

  • Complete the Configuration Menu on page 4 of the installation instructions included with the White-Rodgers 1F86-344. If you have boiler heat, select SL in Step 2 of the Configuration Menu.

Tips & Warnings

  • Make sure the individual wire strands have their insulation intact with no cracks or breaks. New thermostats, including the White-Rodgers 1F86-344, require only about 1/4 inch of exposed wire for the electrical connections. Unnecessary exposed wire creates the potential for future HVAC problems.
  • Make sure the electricity is turned off. Crossing the live wires of a low voltage thermostat can damage the electrical components of a heating and air-conditioning system.

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