Things You'll Need
Nordyne manufactures a complete line of heating and cooling products. The company's product line includes split-system air-conditioners and heat pumps, furnaces, packaged heating and cooling units, and a number of air system accessories such as thermostats. The company's brand names include Kelvinator, Gibson, Tappan, NuTone and Westinghouse.
Disconnect the power to the heating and air-conditioning unit. This can usually be done simply by flipping the appropriate breaker switch. Grasp the cover of the thermostat at the top and bottom. Pull the cover away from the body of the thermostat.
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Place the body of the thermostat against the wall opening where it will be installed. Make sure the thermostat is level. Draw marks on the wall where the screws will be placed. Drill holes at the marked points. Pull approximately 3 inches of wire through the wall opening. Strip the ends of the wire.
Attach each wire to the appropriate screw terminal located on the back of the thermostat. Each screw terminal is labeled with a letter corresponding to a particular color. For example, the red wire connects to the terminal marked with an "R." Tighten down each screw terminal to secure the wires.
Push the wire back into the wall. Insert noncombustible insulation into the wall opening. Place the thermostat body on the wall so the mounting holes line up with previously drilled holes. Insert and tighten screws into each of the mounting holes.
Push the thermostat cover onto the thermostat body. Connect the low-voltage circuits according to the wiring diagram included with the Nordyne thermostat, referring to the wiring diagram on the furnace or heating appliance as needed.