Lennox Smart Tech

Lennox Smart Tech

Mobile Service & Installation

59 ratings
3 reviews
Free

Details

  • Released
  • Updated
  • November 8, 2022
  • March 27, 2026
Lennox Smart Tech screenshot #1 for iPhone
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Lennox Smart Tech screenshot #5 for iPhone
Lennox Smart Tech screenshot #6 for iPhone
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About

Streamline the installation and servicing of compatible home comfort systems. This app allows for remote testing, diagnostics, and system setting adjustments directly from a smartphone, reducing the need to physically interact with equipment.

Install and service home comfort systems
Test and run diagnostics remotely
Adjust system settings from smartphone
Compatible with Lennox S40/L40/M40/E40 Smart Thermostats
Direct smartphone control
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What's New in Lennox Smart Tech

4.60.103

March 27, 2026

• Added support for the new E40 Thermostat • Bug fixes and performance improvements for a smoother experience

User reviews

So many connection issues

Brand new S40. Doesn’t connect. Either blue tooth or Wi-Fi. See thermostat. Connecting lasts for 8min but never connects. Same issue on the S30 thermostats. Not friendly at all I have found I save a lot of time just setting up thermostats manually. Luckily I haven’t had remote sensors yet otherwise I would be screwed.
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Worst app I’ve ever used

I wouldn’t wish this app on my worst enemy

Will not connect to iPhone 14 Pro Max!

Cannot use this app! It will not connect to the thermostat. The other techs running iOS and even android operating systems will connect, but there seems to be a problem connecting with 14 pro max. I had to download the app on the customers android just to connect to the thermostat. Please fix the connectivity issues iPhone 14 Pro Max iOS 17.1.1
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Developer apps

FAQ

What is Lennox Smart Tech used for?

Lennox Smart Tech is a mobile application designed to help technicians install and service compatible Lennox home comfort systems, specifically the S40/L40/M40/E40 Smart Thermostats. It allows for remote testing, diagnostics, and system setting adjustments.

Is Lennox Smart Tech free to download?

Yes, Lennox Smart Tech is available for free download. It does not have any associated costs for acquisition or use.

What devices support Lennox Smart Tech?

Lennox Smart Tech is supported on iPhone, iPad, and iPod devices. It is designed for mobile use by technicians in the field.

How often is Lennox Smart Tech updated?

The latest version of Lennox Smart Tech is 4.60.103, last updated on March 27, 2026. This indicates a commitment to regular updates and improvements for the application.

What is the age rating for Lennox Smart Tech?

Lennox Smart Tech has an age rating of 4+. This suggests it is suitable for a broad audience, though its primary users are professional technicians.

Does Lennox Smart Tech have ads?

No, Lennox Smart Tech does not contain advertisements. Users can expect an uninterrupted experience while using the app for service and installation tasks.

What specific Lennox thermostats are compatible with Lennox Smart Tech?

Lennox Smart Tech is designed to work with fully communicating home comfort systems featuring the Lennox S40, L40, M40, and E40 Smart Thermostats.

Can Lennox Smart Tech be used offline?

The provided information does not specify offline functionality. However, given its nature for remote diagnostics and adjustments, an active internet connection is likely required for full operation.