How do I change the language in my S40 Smart Thermostat?
FAQ , Thermostats , Troubleshooting Modified: March 19, 2026
In your thermostat you can go to Menu > Display Settings > Language to choose between English, French, or Spanish. These are the only languages supported at this time.
For more information or a visual representation of steps please reference our user guide here
Find a Local Pro
Enter your zip code to find a Lennox® dealer near you for service, support, or installation.