Yes, the Emerson Sensi Touch 2 requires a dedicated C-wire (common wire) alongside standard low-voltage heating and cooling wire connections (such as R, W, and Y) to supply continuous 24V operating power to its vibrant color glass touchscreen and Wi-Fi radios. Without a secure C-wire connection, the Sensi Touch 2 cannot maintain stable electrical power or reliable wireless connectivity. Callout type="warning" title="Electrical Safety Warning": Shut off power at the main breaker before handling low-voltage wires. Verification: Confirm that stable voltage readings appear in the device settings menu.
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