IDR Help Center Banner

Lennox S40 Thermostat (Model S40)

Product documentation and resources for your system.

Manufacturer Brochure
Compare Thermostats – Features of the S40, E30, M30, L40 Ultimate Comfort System Brochure
User Manual
User Guide
Installation Manual
Installation Manual
Help Videos
No help videos available yet for this product.
Product Videos
No product videos available yet for this product.
Terms & Conditions
Visit main site (CLICK HERE)
IDR HVAC Solutions LLC © All Rights Reserved - 2026