How to Install Honeywell Lyric T5 Wi-Fi Thermostat w/without C Wire!

How to install Honeywell T5 Wi-Fi Thermostat without a common C wire. In this video, I show you how to get around the 5 wire problem when you only have 4 wires going into your current thermostat.
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Set your temperature and mode by talking to Alexa.
AFTER POSTING THIS VIDEO I HAVE REALIZED THAT THE SECOND METHOD BY USING A JUMP WIRE DOES NOT WORK. SEE COMMENTS FOR A WORKAROUND. SORRY FOR THE INCONVENIENCE!
1. Install new HVAC wire to Thermostat and HVAC control board
2. Wire diagram to use the existing 4 wire set up with a bypass jump wire.
Older homes usually only have 4 wires controlling the thermostat without any power coming from a C wire, however, you need 5 wires with the Lyric T-5 Wi-Fi Thermostat with a C wire. The 5th wire (C wire) powers the device and is necessary for the thermostat to work.
I decided to make this video as it took me a while to figure out how to make my wireless thermostat work. I hope this helps!
If you have any questions don't hesitate to leave a comment below.
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[@leonardbutcher3153]

Thanks for the help! Love my new T5 thermostat.

[@safetysmith]

Great job on this video. Your foray into the furnace wiring really helped me out and I was able to remove my old mercury thermostat and install my T5 with complete confidence. Thanks again!

[@MillenniumSocal]

Thank you. I had a wire swapped at the R RC and this definitely saved me a lot of headache.

[@johnsanders9794]

Thanks for taking the time to make this video, it was very helpful!

[@33bradh]

Man I really appreciate the time you took to detail this installation of the thermostat with both 4 or more wires. Glad I found this video I ordered the adapter to go from 4 to 5 wire but I will be returning this now. Again thank you for the video.

[@MythicsEspionage]

Was having troubles installing till i watched your video and we both had the common wire hidden on us! Looked for mine in the wall after you found yours. Thanks great video

[@tyronesomerville9111]

Thank you very much watching your video help me hook up the thermostat I had the same issue you had the blue wire was not connected I was able to do it in 10 minutes watching your video thank you again

[@Amy-ot4jg]

Thanks for the video I just ran a doorbell wire that I had laying around So one single wire for the c wire Thanks again

[@tquin024]

It was very helpful thank you.

[@azg20p11]

Good info

[@mluc1111]

Thank you very much I have the same system as you it helped me 👍🍻🍻

[@user-yp1qy9gg4u]

Great item!

[@Photoflyboy]

There are 2 methods described in this video. The first method works just fine but the second method described with a jumper wire does not work! If you look farther down in the comments one user describes alternatives when using a jumper wire :)

[@artfloridadude7066]

Thanks for the Help! I will use to the fifth wire as shown. No overloading issues so for with the two wires on the same 24vac com? Had to ask. thanks, arthur

[@mbafundo]

My heating and A/C units are in different locations. Which unit would have the "C" terminal to supply the 24V? ALso, because of 2 different units, how do i know whci are the W,G,R and yellow connections at the unit end?

[@AroundIndiana]

Doesn't Honeywell offer a free c wire adapter when you buy their thermostats? They used to at least. There was a mail in offer in the manual

[@gregnouza9706]

Can someone explain!!! HVAC refers to the AC or the boiler????

[@MrDrTanasit]

Will this T5 work with my heater thermostat that has only 2 wires (red and white) 24V Ac system? Just heater no A/C. My current thermostat is the Honeywell CT30A1005 Heat Only Non Programmable Thermostat.

[@jaimecuevas9962]

I only have 4 cable’s will I be able to do that the box comes with a sm white cable but no C adaptor?

[@rgruenhaus]

Does it work with Google Home Hub, Google assistant?