If your thermostat wiring lacks a dedicated C-wire (common wire), you have several safe options to supply continuous 24V power. You can install the included Power Extender Kit (PEK) at your furnace control board (if provided with your model) to multiplex existing wires, use an external 24V plug-in wall transformer adapter, or hire an electrician to pull a new multi-conductor cable through your walls. Callout type="warning" title="Electrical Safety Warning": Always turn off power at the main circuit breaker before touching furnace wiring. Verification: Check voltage metrics in your thermostat settings menu to confirm stable 24V power delivery.
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