(S40) Smart T User Reviews

Reviews Summary

Top reviews

Not a smart thermostat

Only have this unit as we put in a brand new Lennox heat pump and furnace hybrid system. After 11 months of use I can say it’s a basic thermostat, expensive too.

You get no live data of usage, you get the skimpiest data monthly from Lennox. My base model Ecobee gave excellent stats on usage, we could layer data and trend year over year. Now I have a bar chart showing the last two months not day by day usage no comparison of weather vs usage, no raw data that I can feed into my own data model. The information is absolutely there, it’s being gated from the user.
Show less

Not goog like the original version… older thermostat version.

I have multi zone why we lost the ability to manage all zone in the same screen..like it was in the previous version of the thermostat..
now i have to exit my zone, gi in another menu timo change each zone temperature.. :(

Sucks balls

Can’t connect. For what? To track you.

Get a manual t stat

App review - not thermostat

This is a review of the app. While the thermostat leaves a lot to be desired, it is no where near as intuitive as the ecobee app, it functions and runs the system.

This app, is very outdated. It has a poor design and little customization. When attempting to set a temp there are frequently times when the lag between input and communication to the t-stat “reset” the temp you are trying to adjust to.

Scheduling is not customizable. You are unable to add a time period or a time range.

It seems there is only one user account per t-stat. Individual family members seem to need to use one common account. Because of this, it appears that geofencing is not useful and will not work if multiple people in a home use one account. Maybe I am wrong, but there is no supporting documentation pointing otherwise.

Frankly, you can tell there was little investment by Lennox into a worthwhile t-stat app or t-stat software. They should contract out to a professional app developer and start the app over from the ground up. Offer customization similar to ecobee or neat. Offer an updated user interface. And integrate proper user accounts. Finally, adding Home Kit functionality is vital. How many users use the app? Not one has HomeKit functionality.

Disappointed in the software aspect of a very expensive HVAC system.

*this opinion is solely pointed at the software of this app and the t-stat. No opinion is given on the functionality of the HVAC system itself.
Show less

It’s decent

Doesn’t connect alot. UI is horrible. I wish I had my Nest App back . Nest interface was 1000X better

Terrible thermostat

This thermostat and app are terrible. In fact anyone considering the purchase of a Lennox AC would be well advised to thoroughly investigate the thermostat first. It might be enough of a deterrent to redirect your choice of AC units. We have found our thermostats to not be accurate on temperature measurement and hopefully can be recalibrated. The thermostat does not always accept and keep the temperature that is set for control. Also, we have seen the app display one room temperature only to have it immediately jump to a different temperature when we go to make a control setting change on the app. We just had 2 new AC units and corresponding thermostats installed 2 days ago. I do not believe these opinions are based on an unfamiliarity with the thermostats as we previously had the previous but similar S30 version on our older Lennox units.

Update - after about a month my feelings are almost the same. Learning to live with this garbage. Why do companies think they have to fix things that aren’t broken? This ‘new and improved’ thermostat was about like the message you get when you open an app - “you have an update”.
Show less

Laggy and inconsistent connection

The app connection to thermostat is often slow and doesn’t always show the current temperature setting. It takes a while to refresh and correct, sometimes requiring the app to be closed and reopened. Making changes is hit or miss as to whether the setting will hold. Thermostats often report as not connected and then spontaneously come back.
All the while the data connectivity on the thermostat itself runs fine with accurate weather and everything else.
Show less

Make sure your iphone /alexa ap is up to date

When i followed steps to link my Alexa to the Lennox account Alexa couldn't find the device.i was about to refit the nest when I finally realized Apple had a new update for ios which once completed required an update to the alexa app and it was finally able to find the thermostat in alexa giving voice control. I only gave it 3 stars since my nest used to track cycle time history which this no longer does. Also, the screen is pretty dim even on its highest setting for a well lit home. It also doesn't estimate time to target temp like nest did. It does provide the authorized installer service update notices which nest didn't do which I huess is helpful.
Show less

Basic programmable thermostat

It’s adequate, but it’s basic. Our new hvac is a significant upgrade from our previous one, and I am surprised that the required S40 thermostat is such a downgrade from our previous one. Lennox has all sorts of data about how the system is functioning, how much, when, etc. The app would be an excellent place to provide that info (like Ecobee), but instead they send an email with a *very* basic data summary a couple of weeks after the end of the month. Also, the thermostat and app are both surprisingly sluggish to respond to touch, which is the only way to use them.
Show less

Terrible thermostat

This thermostat and app are terrible. In fact anyone considering the purchase of a Lennox AC would be well advised to thoroughly investigate the thermostat first. It might be enough of a deterrent to redirect your choice of AC units.

We have found our thermostats to not be accurate on temperature measurement and hopefully can be recalibrated. The thermostat does not always accept and keep the temperature that is set for control. Also, we have seen the app display one room temperature only to have it immediately jump to a different temperature when we go to make a control setting change on the app.

We just had 2 new AC units and corresponding thermostats installed 2 days ago. I do not believe these opinions are based on an unfamiliarity with the thermostats as we previously had the previous but similar S30 version on our older Lennox units.
Show less

Alternatives to (S40) Smart T