SmartCorgi

Will Honeywell Home Keep Working?

Alive

Made by Resideo · smart and Wi-Fi thermostats, sensors and water leak detectors

89%
Odds it works through 2029

Last checked: October 13, 2026.

Honeywell Home thermostats are in millions of American homes. The brand is made by Resideo, which licenses the Honeywell name, and its main weakness is a confusing mix of apps.

CompanyResideo, spun off from Honeywell in 2018
AppsHoneywell Home (Resideo), Total Connect Comfort and the newer First Alert app
Needs the cloud?Partly. The thermostat runs your system on its own, but app control uses Resideo’s cloud
Works withAlexa, Google Home, SmartThings, and Apple Home on some T-series models
Subscription for basics?No
Sister brandFirst Alert
How long devices get supportOlder Wi-Fi thermostats still run on the Total Connect Comfort app while newer models move to the First Alert app. Resideo has not announced an end date for the older app.

Why 89%

  • Starting point90%Resideo, a large public company spun off from Honeywell in 2018.
  • Track record−3Spreads its thermostats across several apps and is moving users to a new First Alert app.
  • Works without the cloud+2Thermostats run on their own, and some T-series models work with Apple Home.
  • Our estimate89%

The good news: Resideo is a big company, and since spinning off its ADI distribution business in August 2026, products like thermostats are its main business, and a thermostat keeps heating and cooling your house even if the app side has problems.

The bad news: Depending on your model, you might use the Honeywell Home app, Total Connect Comfort or the newer First Alert app, and Resideo is pushing people toward First Alert. Some owners worry older Total Connect Comfort models will be left behind, though Resideo has not announced an end date.

If you own Honeywell Home

  • Check which app your thermostat uses, and watch for emails about moving to the First Alert app.
  • If you have a T-series model that supports Apple Home, add it as a local backup.

← Back to the Shutdown Tracker