How do I replace a Smart Air Quality Monitor in my home?
FAQ , Air Quality , Troubleshooting Modified: March 19, 2026
To replace an already installed device from the Lennox S40 Smart Thermostat, use the following procedure:
1. On the Lennox Home App: Go to Menu > Settings > Smart Devices.
2. Select the Smart Air Quality Monitor to replace and follow the screen prompts.
3. If you wish to reuse the device you replaced in the future, perform a factory reset on the device.
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