"Official definition"
What is the C wire used for on a thermostat?
The C wire, or “common wire” enables the continuous flow of 24 VAC power to the thermostat. ... If your system doesn't have a C-wire, you'll need to run a new cable from your furnace to your thermostat to install most of the modern smart thermostat models. Thermostat wire is just a big spool of bundled, color-coded wires.
Majority of thermostats in homes these days do not have common wires, aka C wire. Nest thermostats claim they do not need a C wire. The nest claim is true and that is magical but, that is not always the case.
Installing the common wire is something WE DO and DO NOT charge extra for. Innovative air has been a nest pro for many, many years and wont neglect the benefit of installing a common wire, aka C wire during a nest thermostat installation.
It's like giving a car 87 octane and then giving it 91.... The nest will act like the happy little thermostat that it is... In Arizona, you do not want to have issues with your AC not working because of your wonderful nest thermostat. Get nest thermostats installed professionally by innovative air, you wont regret it. WE don't charge extra to install a c wire on a nest thermostat but, we know a ton of HVAC companies in arizona that do.
Veteran air conditioning techs who have installed many Honeywell thermostats over the years know what good a common wire does to a higher technology stat.That is why they are added. Real HVAC pros and installers add C wires to any thermostat that runs on batteries. When the battery dies, you still have power to that awesome thermostat. Electrical stability is prime for any high tech thermostat and that is just what a Common, C wire does for your Nest thermostat.
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