Help and Support

What do you need help with?

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.

Search for Rebates

Can't find what you're looking for?

TOP SEARCHED VIDEOS

Video Thumbnail

Add a C-Wire Adapter

Video Thumbnail

How to Install a Honeywell Home T3, T4, T5, T6, T9, T10, and T10+ Thermostat

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: Loading...
Total Connect Comfort App: Loading...
First Alert App: Loading...

Not the DIY Type?

Contact a local professional partner.

FIND A PRO

Need Some Extra Help?

Chat live with a support agent.
Must accept cookies

CHAT WITH A SPECIALIST

Contact Us

Connect with our support team.

CONTACT SUPPORT

Your Shopping Cart

Your cart is empty

Start Shopping

Subtotal:$0.00 USD