How to Wire a Seven Wire Thermostat

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    • 1). Turn off the power to the heating and air conditioning system at the main service panel.

    • 2). Remove the old thermostat cover and body to expose the low-voltage wires.

    • 3). Label the wires using masking tape to identify their screw terminal locations.

    • 4). Disconnect all low-voltage wires.

    • 5). Remove the terminal base from the wall, leaving only the low-voltage wires exposed through the wall.

    • 6). Thread the low-voltage wires through the terminal base of the new thermostat and mount the base to the wall using drywall anchors and screws. Check the alignment with your level.

    • 7). Connect the low-voltage wires to the appropriate terminal screws using the manufacturer's chart and your labels to identify the appropriate locations.

    • 8). Attach the thermostat body and cover to the terminal base.

    • 9). Turn on the power at the main service panel and program the new thermostat according to manufacturer's instructions.

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