The colours of the wires in the gang box are different from your wiring diagrams. What do I do?

Warning: The installation of high voltage equipment should be performed by a qualified electrician. Please ensure that you comply with local electrical codes and regulations. Improper installation can lead to device failure and even cause a fire. Damage to thermostat due to improper installation is not covered under warranty.

1) Start by determining the purpose of each of your wires in your electrical box. Voltage identification guide, here.

2) Reference the wiring guides here. 240V and 120V

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