Resideo Help & Support

What do you need help with?

I need help with installationI need help programming my thermostatI want to replace or buy a new thermostatMy device isn’t workingI need to find a manualT9 and T10 Firmware Update

Warning! Improper wiring or commissioning of your thermostat can cause unintended operation of your HVAC system which could lead to property damage, injury, including death. If you are unsure of what type of system you have, refer to your heating/cooling system equipment literature or call an HVAC professional.

Already own a smart thermostat? You may be eligible for rebates with your local energy provider.

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How to connect to WiFi and Resideo App - T5 Smart & T6 Pro Thermostats

How to connect to WiFi and Resideo App - T5 Smart & T6 Pro Thermostats
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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.

Check Compatibility

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

Resideo – Smart Home:

Total Connect Comfort App:

First Alert App:

View all app statuses

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