Sensational Nest Thermostat Blue Wire

The nest thermostat contains a rechargeable lithium ion battery.

Nest thermostat blue wire. So even though nest thermostats have wi fi activity sensors color displays and more they typically don t need a c wire to stay charged up. If so the black one is probably the c wire but you should check the wire configuration on the system control panel to make sure. So to keep itself going the nest recharges itself from your hvac system s wiring.

For comparison a typical 40w light bulb that s only used 4 hours per day consumes about 5 kwh month. If playback doesn t begin shortly try restarting your device. Just connect it to the c terminal and it becomes the c wire.

This battery runs the programming and keeps the thermostat connected to wifi but wifi connectivity is draining the battery doesn t last very long on its own. The yellow wires underneath your thermostat connect to your compressor. Most contemporary thermostats such as nest thermostats featuring internet connectivity have a common terminal.

Make sure you know what s happening underneath your thermostat. Nest thermostats don t typically need a c wire. Please try again later.

However if you have a rheem or rudd system you may see a black wire as well as a blue one in the wire set. The white wire connects to terminal w in industry standard thermostats. Nest thermostats are engineered to use very little power less than 1 kwh month.

The blue wire completes the 12 24 volt circuit so the nest receives full power 100 of the time even if the hvac isn t running. If the b wire is blue it should most likely be connected to the c connector. The steps shown is this video are not only for honeywell thermostats but also many o.