Lennox15Z69 iComfort M30 Universal Smart Programmable Thermostat, 4.3" LCD Color Display, Geo-Fencing, Remote Access, Wi-Fi and Alexa Enabled

The tricky part is changing from old wiring R, i+, i-, C to new 8 wire +2 wire for outdoor temp sensor system with this thermostat. The original installer had cut 4 of the 8 wires, run from inside unti to Home Thermostat. I had to reconnect those. My inside unit has two wiring bars. I had to dewire from R, i+, i-, C bar and then connect all 8 wires to the longer bar with W1, W2, G, Y2, Y1, C, R, O matching thermostat. The outside temp sensor has 2 wires run to inside unit, that was sharing 2 wires over to thermostat, so I lost those wires. The M30 Wifi connects to internet and can show outside temp from internet until I can run 2 new wires down to thermostat. Wifi also sets day & time. The air circulation fan works and you can adjust how much it runs per hour upt to 30 mins. I like the screen save mode, as it turns completely dark. That can be left on if you like the light at night. And there is a brighness setting which is nice. Picture shows original 4wires with old thermostat to new 8 wires conencted to new location on inside unit. The M30 letters match so its just a matter of keeping the wires color-to-numbers the same.

We purchased 4 of these from this company and how can 3 of the 4 be bad? The return window is so short and we had to eat the cost plus buy new ones from someone else. We purchased for new construction and couldn’t install right away. No customer service and horrible products. Are they selling refurbished units? I’d purchase somewhere else.

Don’t call it universal if it is not. This thermostat does NOT work with a Lennox communicating system without significant rewriting and loss of system functionality. It is a nice unit, just not for certain systems.

Control thermostat through WiFi

The color screen and wify capabilities are great.

Nice looking, easy to use, and connects with wifi. A little pricey, but I have a Lennox system, and wanted to make sure compatibility wouldn't be an issue. Been reliable so far. I would recommend.

Used this item for my home Hvac system

Didn't work on my HVAC air conditioning & heating unit. I purchased a Bosch BC 100 thermostat. Which worked! It's helpful if ur tech. Savy... some wiring required.