![]() ![]() But some HVAC systems don’t allow for enough current to pass through the Nest Thermostat while the HVAC system is off which causes the internal battery on the Nest to deplete. In most cases the Nest Thermostat doesn’t need a c wire because it is able to charge the system, from being connected to the thermostat wires. Adding a C or Common wire as it is also known provides your Nest Thermostat with a continuous source of power so that the internal battery inside the Nest Thermostat can charge. ![]() In the video below we teach you the easy way to install a C wire transformer. ![]() In most cases the addition of C wire transformer can fix the power error on the Nest Thermostat. How A Nest Thermostat WorksĪ C wire or Common wire transformer is use to power Nest Thermostats that are showing low power or low power errors. This C wire Transformer will work with both the Nest Thermostat Generation 3 and the Nest Gen E Smart Thermostat. In this video blog post we cover the Best C Wire Transformer that we have tested and know works with the Nest Thermostat. ![]()
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