Perfect comfort is something we want you to experience long after you’ve purchased your Lennox® product. That’s why we offer a collection of resources that make it as easy as possible for you to get the answers and support you need.
From the thermostat, if you go to Menu > User Account > Email > Forgot Password > Enter Password and hit Accept, you will be able to reset your Lennox S40 Smart Thermostat password.
From the Lennox Home App, if you are signed out, then tap/click on the "Trouble Logging In?" button.
For more information or a visual representation of steps please reference our user guide here
It's easy to find an expert Lennox Dealer who can help you make the most of your HVAC system.
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It's also easy to find an expert Lennox® dealer who can help
you make the most of your HVAC system.
