Emerson Sensi ST55U Smart Wi-FI Thermostat White
Emerson Sensi ST55U Smart Wi-FI Thermostat White
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Emerson

Emerson Sensi ST55U Smart Wi-FI Thermostat White

1,016 ratings

Key item features

  • Sold as 1 Each.
  • Designed to work with the wires you already have, Sensi thermostat does not require a common wire (c-wire) for most installations, so it is compatible with the HVAC equipment in many homes in U.S. Canada.
  • A c-wire is required for heat-only, cool-only and heat pump (without aux) systems, and for use with Apple HomeKit.
  • The intuitive app walks you through each step of installation with custom configured instructions, removing all the frustration and guesswork from the installation process.

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.9 out of 5 stars
stars
1,016 ratings1,006 reviews
How item rating is calculated
  1. 5 stars94% (950)
  2. 4 stars4% (45)
  3. 3 stars0% (5)
  4. 2 stars0% (5)
  5. 1 star1% (11)

Reviews summary

Pros

  • : Process is simple and easy to follow.
  • : Easy to navigate and program with minimal effort.
  • : Can be controlled and monitored from a mobile device.
  • : Allows remote temperature control and scheduling through it.
  • : Allows control from phone or other devices.
  • : Allows for remote adjustments and accurate readings.
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Showing 1-3 of 1,006 reviews

May 11, 2026
Reviewer name: Walmart customer
5 out of 5 stars
5 out of 5 stars review

Easy to use and works great

I am very satisfied with my Sensi Smart Thermostat. The installation process was quick and easy, and it has worked perfectly since day one. The app is very user-friendly, and I love being able to control the temperature from my phone anytime. The system keeps my home comfortable at all times, and I have noticed better energy efficiency with my air conditioning. In addition, the thermostat has a modern and elegant design that looks great on the wall. I would definitely recommend Sensi to anyone looking for a reliable and easy-to-use smart thermostat.

Review from Sensi
Helpful?5PLXULX61I9W230073443
Jun 19, 2026
Reviewer name: Mohamed
Sold byCoolest StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Thermostat

Works as advertised Remotely controlled and reasonably priced

Helpful?5PLXULX61I9W230073443
May 8, 2026
Reviewer name: Ash1234
5 out of 5 stars
5 out of 5 stars review

It's a great thermostat

I got this a couple months ago and I'm glad I did one of my favorite features is you can lock it so the kids can't play with the temperature while you're not home and another favorite feature is you can set it for certain times to be this temperature or if it gets above this temperature the AC turns on but if it gets below this temperature, the heat turns

Review from Sensi
Helpful?5PLXULX61I9W230073443
Current price is $78.35
Price when purchased online
  • Free shipping
  • Free 90-day returns
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