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![Add a C-Wire Adapter](https://www.honeywellhome.com/us/en/-/media/Resideo%20System/Lazy%20Loading%20Placeholders/p.png?as=1&h=720&iar=1&w=1280&rv=79210d9cc6474921950959a623d6e954&hash=0D2EDE4EFDC36CF3A6340FE6EBDE9D53#https://www.honeywellhome.com/us/en/-/media/Resideo/Support/video_images/Add-a-C-Wire-Adapter.jpg?h=720&w=1280&rv=3ada28bd1fee47c3bd6771c41c415965&hash=0D2EDE4EFDC36CF3A6340FE6EBDE9D53)
Add a C-Wire Adapter
![How to Install a Honeywell Home T3, T4, T5, T6, T9, T10 and T10+ Thermostat](https://www.honeywellhome.com/us/en/-/media/Resideo%20System/Lazy%20Loading%20Placeholders/p.png?as=1&h=720&iar=1&w=1280&rv=79210d9cc6474921950959a623d6e954&hash=0D2EDE4EFDC36CF3A6340FE6EBDE9D53#https://www.honeywellhome.com/us/en/-/media/Resideo/Support/video_images/How-to-Install-a-Honeywell-Home-T3-T4-T5-T6-T9-T10-T10-plus-Thermostat.jpg?h=720&w=1280&rv=1500bd713ca94e32a826eb1d54f3a91a&hash=0D2EDE4EFDC36CF3A6340FE6EBDE9D53)
How to Install a Honeywell Home T3, T4, T5, T6, T9, T10 and T10+ Thermostat
THERMOSTAT WIRING COMPATIBILITY
Unsure if Honeywell Home thermostats from Resideo are compatible with your home? Use our tool to determine which thermostats work with your home’s existing wiring.
APP STATUS
Your issue may be related to a system outage on one of our applications. See current status of Resideo's mobile applications below
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Total Connect Comfort App:
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