How to Install the
Lennox Wireless Extender
1. Install the Lennox Smart Thermostat app. Scan the QR code
to download the app and user guide and view how-to videos.
2.Plug in the Wireless Extender into a power outlet. Make sure
there is no metal in close proximity as it may interfere with the
wireless connection.
3.Add the Wireless Extender to the thermostat BLE mesh
network. A wizard will walk you through the steps to add the
Wireless Extender.
4.Confirm the desired Wireless Extender location has adequate
signal strength.
How to Replace or Remove a Lennox
Wireless Extender
1. Install or open the Lennox Smart Thermostat app.
Go to System Settings and tap on the Wireless Extender.
2.Tap either Replace or Remove buttons.
The Lennox Wireless Extender improves the connection between the Lennox S40 Smart Thermostat and smart sensors, such as the
Lennox Smart Room Sensor and the Lennox Smart Air Quality Monitor, in larger homes or areas with reduced coverage or “dead spots”.
This strengthened connection nearly doubles the coverage area and enhances reliability, performance and usability.
Welcome to the Lennox Wireless Extender
For additional setup, videos and
troubleshooting information, go to:
lennoxsmartertogether.com/help/index.html
How to Rename a
Lennox Wireless Extender
1. Install or open the Lennox Smart Thermostat app.
Go to System Settings and tap on the Wireless Extender.
2.You can tap on Extender Name and type in your desired
Wireless Extender name.
Note: Adding or removing a device can only be done through
the Lennox Smart Thermostat app.
