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Emerson Sensi Thermostat ST55U

Availability: In stock


Regular Price: $125.00

Your Price $25.00



Designed with a large display, intuitive app, and easy in-app installation, this thermostat simplifies comfort while keeping you in control from anywhere.

  • Flexible Scheduling - Create a custom schedule to fit your lifestyle
  • Smart alerts - Get alerts if Sensi detects abnormal temperatures and humidity levels
  • Sleep, low profile design and traditional footprint
  • Large, backlit screen perfect for low lighting


Part # R5000.46
Manufacturer Model No
Single-Stage Heat/Cool Yes
Two-Stage Heating/Cooling Yes
Line Voltage Heating No
Wi-Fi Enabled Yes
Self-Learning No
Warranty (Years) No

Customer Reviews 2 item(s)

Thank You Ameren!
I have had this thermostat installed for over a year and have not had a single issue with it. Installation was simple, just do yourself a favor and take a pic of the wires connected to your old one for reference. Major Kudos to Ameren for offering such an AMAZING deal on these smart thermostats. Review by Kris W / (Posted on 8/20/2020)
Well worth it! Easy to install. Can manage from phone. Very nice thermostat.
Very nice thermostat. Was easy to install and can manage from my phone. Love it. Just a great deal and well worth it. Review by Dennis / (Posted on 6/18/2020)

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