What is a common wire HVAC?
The wire C, or common wire, allows the continuous flow of 24 VAC of energy to the thermostat. If your system does not have a wire C, you will need to run a new cable from the furnace to the thermostat to install the most modern models of intelligent thermostat. The wire thermostat is just a large coil of wire wrapped and encoded by colors.
Let's Get It Fixed!
Our virtual experts can diagnose your issue (for free!) and resolve simple problems.