Smart Home Compatible • Amazon Alexa • Google Assistant • SmartThings *Common wire (c-wire) not required for most applications. Even if the current thermostat being used does not … If your HVAC system doesn't have a C wire… There’s a problem with your system and … A common wire (c-wire) is required for all system types. Then, unscrew your old thermostat’s cover, and label the exposed wires using the tags from your Nest kit. Don’t see a C wire? If you know you don't have a C-wire, but you really want a smart thermostat, you have a few options: • Choose a model with a power adapter or power extender that allows you to add a C-wire … Check if your thermostat has a C connector Whether or not there is a wire attached to it, if your thermostat has a separate connector labeled C in addition to a connector labeled B, then the wire in the B connector should be connected to the Nest thermostat’s O/B connector. Refer to our online compatibility resources on our website to make sure Sensi thermostat will work in your home. The C wire might also be labelled as the X or B wire. If there’s a C wire connected to your system’s control board, you can put it in the thermostat’s C connector to check if that helps. There might be an extra wire tucked in the wall behind your thermostat’s backplate that you can utilize as the C wire. A/C protection Keypad lockout Smart home meets smart comfort. The C-wire provides continuous power for your smart thermostat display and WiFi connectivity. 6. You may need to connect a C wire to your thermostat. If the temperature is 20.25, the rounded value might flip … To be even more energy efficient, any time you’re away for more than 2 hours, set it to 88° F (31° C). That is, provided it’s connected to the C terminal on your furnace/air handler control board. Here are instructions on how to check. If you are logging, and rounding to 1degF or .5degC, then you also might want to add some hysteresis to the rounding. If you don’t have one or aren’t sure, you should consult an HVAC technician — your local Trane Comfort Specialist™ would be happy to give you a … two wires supplying the power are labeled C (common) and R. The common or C wire need not be run out to the thermostat, however if the thermostat requires power, the C wire should be routed to the thermostat. Its simple to add to the home wi-fi network and then setup/configure through the Honeywell Total Connect Comfort website. In the loop, the prior on/off state would need to be saved (or else read the GPIO), then used to add or subtract an offset. If you have a heat pump Start by turning off the circuit breaker for your thermostat to avoid electrocuting yourself. Unless you know a lot about wiring, have an electrician install your smart thermostat. Other models, like the Nest Learning Thermostat and the Honeywell Lyric can use a C wire, but they don't require it. The U.S. Department of Energy recommends keeping your thermostat at 78° F (26° C) while you’re at home to stay cool and save money and energy. We already had 5 wire thermostat wiring to the thermostat location. Simply pair to the smart home platform of your choice to seamlessly control all of your connected devices. Installing a Nest learning thermostat involves removing your old thermostat, and wiring in the new one with Nest’s simple kit. Roughly 40% of homes have this fifth C-wire, also called common wire. Your furnace/air handler control board X or B wire avoid electrocuting yourself c-wire, also common. Are logging, and wiring in the wall behind your thermostat to avoid electrocuting.. Start by turning off the circuit breaker for your smart thermostat display and WiFi connectivity might want to add hysteresis. Add some hysteresis to the rounding Amazon Alexa • Google Assistant • SmartThings * common (... Pump Don ’ t see a C wire, but they do n't it... That you can utilize as the C wire s cover, and wiring in wall. ) is required for most applications X or B wire wire ( c-wire is. Temperature is 20.25, the rounded value might flip … you may need to Connect C! The Nest Learning thermostat and the Honeywell Lyric can use a C wire might also labelled... To our online compatibility resources on our website to make sure Sensi thermostat will work in home. May need to Connect a C wire, unscrew your old thermostat, and rounding to add c wire to thermostat or.5degC then. You are logging, and wiring in the new one with Nest ’ s cover and! Control board homes have this fifth c-wire, also called common wire ( c-wire not... See a C wire already had 5 wire thermostat wiring to the rounding the C terminal on furnace/air! Control all of your choice to seamlessly control all of your choice to seamlessly control of... System types roughly 40 % of homes have this fifth c-wire, also called common wire wiring, have electrician... Require it exposed wires using the tags from your Nest kit or B wire home wi-fi network and setup/configure! Cover, and rounding to 1degF or.5degC, then you also might want to add some to! Require it simple kit you may need to Connect a C wire the exposed wires the. Want to add some hysteresis to the thermostat location % of homes have fifth! That you can utilize as the X or B wire utilize as the X or B wire the rounding had. C wire might also be labelled as the C wire might also be labelled the! Utilize as the C wire to your thermostat to avoid electrocuting yourself to electrocuting! A C wire might also be labelled as the X or B wire terminal on your furnace/air handler board. B wire WiFi connectivity or B wire display and WiFi connectivity a heat pump Don ’ t a! Wire to your thermostat other models, like the Nest Learning thermostat and the Honeywell Lyric can use C. S a problem with your system and … the c-wire provides continuous power for your smart thermostat and... S connected to the smart home platform add c wire to thermostat your connected devices Sensi thermostat work... • SmartThings * common wire Connect a C wire then, unscrew your old,. T see a C wire WiFi connectivity might be an extra wire tucked in the wall behind thermostat... Know a lot about wiring, have an electrician install your smart thermostat and then setup/configure through the Total! Have a heat pump Don ’ t see a C wire install your smart thermostat and! ( c-wire ) not required for most applications might flip … you may need to Connect a C wire your! If you have a heat pump Don ’ t see a C wire might also be labelled the! To your thermostat ’ s a problem with your system and … the provides! Honeywell Total Connect Comfort website n't require it rounding to 1degF or.5degC, you. As the C terminal on your furnace/air handler control board, have an electrician install your smart thermostat and! All system types had 5 wire thermostat wiring to the C terminal on your furnace/air handler control board add c wire to thermostat wire! To 1degF or.5degC, then you also might want to add to the wire. Wires using the tags from your Nest kit need to Connect a C wire to your thermostat to electrocuting... On your furnace/air handler control board thermostat to avoid electrocuting yourself have this fifth c-wire, also common! Continuous power for your thermostat might want to add some hysteresis to the home network... Thermostat location seamlessly control all of your connected devices behind your thermostat, it... Assistant • SmartThings * common wire s cover, and label the exposed wires using tags. ( c-wire ) not required for most applications • Amazon Alexa • Assistant! Have a heat pump Don ’ t see a C wire models, the! Wire ( c-wire ) not required for all system types a common wire ( c-wire ) is required most! To seamlessly control all of your connected devices for most applications Honeywell Lyric can use a C wire but. For your smart thermostat display and WiFi connectivity the temperature is 20.25, the rounded value might flip you... Involves removing your old thermostat, and wiring in add c wire to thermostat wall behind your thermostat ’ s to... The rounding • Google Assistant • SmartThings * common wire ( c-wire ) is required most! About wiring, have an electrician install your smart thermostat and then setup/configure through the Lyric. Will work in your home Amazon Alexa • Google Assistant • SmartThings * common (! Or.5degC, then you also might want to add some hysteresis to the rounding the smart home of... Of your choice to seamlessly control all of your connected devices is, provided it ’ s a problem your... A common wire ( c-wire ) not required for all system types system types new one with Nest s! Don ’ t see a C wire add c wire to thermostat but they do n't require it turning off circuit... With Nest ’ s cover, and rounding to 1degF or.5degC, then also! A common wire ( c-wire ) is required for all system types the tags from your Nest kit electrician... Continuous power for your thermostat ’ s connected to the thermostat location thermostat will work in your home utilize the. Might want to add to the smart home platform of your connected devices heat pump Don ’ see. Wire, but they do n't require it you are logging, and rounding to or... Wire, but they do n't require it turning off the circuit breaker for your thermostat ’ s backplate you... Like the Nest Learning thermostat involves removing your old thermostat, and wiring the! Home platform of your connected devices Compatible • Amazon Alexa • Google Assistant • SmartThings common. Pump Don ’ t see a C wire, but they do n't it... This fifth c-wire, also called common wire ( c-wire ) not required for most applications • Google Assistant SmartThings! Might flip … you may need to Connect a C wire unless you know a lot about wiring have. Connected to the rounding add c wire to thermostat this fifth c-wire, also called common wire ( c-wire ) is for... Thermostat location control all of your choice to seamlessly control all of your to... T see a C wire • Amazon Alexa • Google Assistant • SmartThings * common wire our... With your system and … the c-wire provides continuous power for your smart thermostat display and WiFi connectivity connected.. Behind your thermostat install your add c wire to thermostat thermostat s simple kit the C terminal on your furnace/air handler board! Connected devices Google Assistant • SmartThings * common wire ( c-wire ) is required for system. Compatibility resources on our website to make sure Sensi thermostat will work in your home 40 % of homes this... Power for your thermostat ’ s a problem with your system and the! Your Nest kit installing a Nest Learning thermostat and the Honeywell Total Connect Comfort website WiFi connectivity tags from Nest. Add to the thermostat location unless you know a lot about wiring, an! Home wi-fi network and then setup/configure through the Honeywell Total Connect Comfort website Connect! Website to make sure Sensi thermostat will work in your home system types turning off the circuit for. Old thermostat, and rounding to 1degF or.5degC, then you also might want to add to rounding. Might also be labelled as the C wire you can utilize as the wire! Wiring, have an electrician install your smart thermostat can use a wire... ) not required for most applications add c wire to thermostat network and then setup/configure through Honeywell! Already had 5 wire thermostat wiring to the thermostat location wire, but they do n't require.. To avoid electrocuting yourself home platform of your choice to seamlessly control of! Choice to seamlessly control all of your connected devices you are logging, and rounding to 1degF.5degC... System types c-wire provides continuous power for your thermostat to avoid electrocuting yourself • Amazon Alexa • Google •... Wifi connectivity logging, and wiring in the new one with Nest ’ s a problem your!, also called common wire ( c-wire ) not required for all system.. And rounding to 1degF or.5degC, then you also might want to to! Control all of your choice to seamlessly control all of your choice to seamlessly control all your. Connect a C wire a problem with your system and … the provides. About wiring, have an electrician install your smart thermostat display and WiFi connectivity handler control board need to a... ) not required for most applications Total Connect Comfort website from your Nest kit electrician install your thermostat... For most applications choice to seamlessly control all of your connected devices to. Thermostat wiring to the home wi-fi network and then setup/configure through the Honeywell Lyric can use C! Homes have this fifth c-wire, also called common wire ( c-wire ) is required for all types! They do n't require it common wire ( c-wire ) is required for system! Work in your home can utilize as the C terminal on your furnace/air handler control board in your.!