If you're going from an older thermostat to a new smart one, you may find that your system is without a C wire. If that's the case, you can install one, pay to install one, or simply grab one of these smart thermostats that don't even need one.
Best smart thermostats that don't require a C wire 2023 : Read more
Best smart thermostats that don't require a C wire 2023 : Read more
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