Emerson Sensi Thermostat Review

Thermostat :
Emerson Sensi

Reviewed by:
On January 25, 2015
Last modified:October 12, 2016


Pros : Nice design, easy to install & use . Work great . 3 years warranty .
Cons : No color display , don't have Auto-Schedule.

Maintaining the temperatures of buildings, houses, offices and even locomotives is a big job. Weather and temperatures always fluctuate and this prompted the need for a smarter type of thermostat; one that could sense the rise or fall of the temperature and react accordingly. The Emerson Sensi Thermostat does just that.

emerson sensi thermostat

Having temperatures at a pre-determined set value seems to be people’s preference these days. People have even come to expect it. The comfortability of guests and family members prompts many heads of households to seek out the latest and best thermostats available.  In my research to find out the best way to regulate temperatures, I found the White-Rodgers Emerson Sensi Thermostat.

Emerson Sensi Thermostat Description

emerson sensi thermostat

White-Rodgers 1F86U-42WF Emerson Sensi Wi-Fi Thermostat

A thermostat is a device that keeps an area within a limited temperature range by automatically switching the supply of heat on or off. It senses the temperature of the area and adjusts it so that the temperature is maintained at or near a desired set point. Technology has made it possible for thermostats to be constructed in many ways by the use of various sensors to measure the temperatures at different  points, after which the feedback of the sensor is used to control the heating and cooling device.

White Rodgers Emerson Sensi Thermostat is the first Wi-Fi Thermostat to be released after a long period of research on the subject of wireless thermostats. The device has a simple design that makes its installation very simple. In addition to the simplicity of its installation, it is also very simple to connect it to the internet. It can be accessed from smartphones, tablets or a PC and does not require any wires for most applications. One does not have to be at home or near the device  in order for the thermostat to work. You can be across town and still regulate the temperature of your house.


emerson sensi thermostatThe White-Rodgers Emerson Sensi Thermostat has a height of 1.5 in, a width of 5.5 in when assembled and a display height of 1.75 in. The design of the thermostat includes an app that is used as a support mechanism for installing the thermostat. There are steps to be followed one-by-one for the successful installation of the thermostat and there are links and videos attached to the steps to follow in order to install the thermostat. The app can be used by the owners of the thermostat or by professional HVAC contractors.  The design of the White-Rodgers Emerson Sensi Thermostat makes it a very easy to install, use and work with as long as the installation steps are followed to the letter. A failure to follow the steps may lead to unsuccessful installation of the thermostat which may result in poor functionality.


emerson sensi thermostat

White Rodgers Thermostat

The Sensi is convenient, programmable and understandable with internet functionality enabled. The Sensi does not have any TCP ports, so it is completely wireless.

White-Rodgers 1F86U-42WF Emerson Sensi WiFi Thermostat has the ability to be  set up to different schedules or the temperature can be kept constant.

White-Rodgers Thermostat does not have a C-wire. This makes configuring it a hard task but its technology is perfect and the functionality is superb.

Additional Features of the Emerson Sensi Thermostat

emerson sensi thermostat

Save up to 30% in energy costs.

The Emerson Sensi Wi-Fi Thermostat is more affordable than the competition and could help you save up to 30 percent on heating and cooling costs.

If it is your first time installing a thermostat, you might run into some trouble. Go here for help on how to do an installation.

emerson sensi thermostat

You can access it from anywhere – home or away – right from your smartphone or tablet ( IOS AppAndroid AppWeb App)

If you don’t want to throw away your old system, White-Rodgers WiFi Thermostat enables consumers to use their older unit.

The thermostat manufacturer provides a three year warranty for the White-Rodgers 1F86U-42WF Emerson Sensi WiFi Thermostat including a maintenance and repair services whenever the device runs into any mechanical problems. There are also shipping and delivery options including delivery by small parcels services but the processing time varies depending on the product.

Product Specification

Model Number1F86U-42WF
Universal Application4 Heat / 2 Cool
Dimensions5.9 x 1.1 x 3.8 inches
Batteries2 AA Batteries Included
Weight1.5 pounds
Setpoint Temperature Range45° to 99° F (7° to 37° C)
Operating Humidity Range90% non-condensing maximum
Electrical Specifications20 to 30 VAC, 50/60 Hz
0.05 to 1.5 Amps
(load per terminal)
1.5 Amps maximum load
AccessoriesThermostat Guards Clear – F29-0198
Average Battery Life9000 hours
Date First AvailableDecember 23, 2013

How to installation guide


White-Rodgers 1F86U-42WF Emerson Sensi is a great Wi-Fi thermostat with superb functionality. It is a splendid device in terms of its design, installation and usability and there is no need for the owner to be close to the system. If you are a fan of simplicity and stability, White-Rodgers can definitely meet your demand.


    • admin says

      Sensi has five email alerts that will notify the customer when certain conditions occur. The alerts are automatic and will generate a second email if the condition still exits after a week. At this time, the alerts cannot be changed. Below is a list of the conditions that will generate an email alert:
      *High Home Temperature > 99ºF
      *Low Home Temperature < 45ºF *High Humidity > 78%
      *Loss of Heating – room temperature goes down 5ºF during a heating demand
      *Loss of Cooling – room temperature goes up 5ºF during a cooling demand

  1. Jean Bon says

    I’ve got 2 questions
    Is it possible to switch in Celcius degree and not only in °F ?
    is it possible to get the clock in 24h type or only on the 12hAM/PM ?

    • William says

      Hi Jean Bon,
      1. Yes. You can select temperature display to F or C by Press HOLD to advance to next item or TIME to move backwards to previous item .
      2. Normally, the thermostat is set to display 12-hour time meaning AM/PM time. However, if you want to change display a 24-hour clock, you can press and hold SET TIME and RUNPRGM buttons at the same time .
      You can see how to install & download manual at here
      Thank you 🙂

    • tdfellows says

      YES! You enter a password on setup (comes with unit, and can be changed) and have to enter the password on whatever device you watch to use to control it.

  2. says

    If using a heat pump as primary heat with aux fossil fuel the sensi does not work properly. Stay away from SENSI STAT. IT WILL CREATE PROBLEMS FOR YOU AND DESTROY YOUR COMPRESSOR . They are not set up internally through the logitherium it has built into device. In eastern Canada they do not work properly. What a mess it can cause for home owner and H.V.AC.R COMPANY.Stick with what always works. HONEYWELL.

  3. Ri says

    For the Emerson Sensi thermostat, what happens to the thermostat if my WIFI goes out? Does it stay where it was set when the WIFI was on and my furnace continue to operate with current settings? Does the Thermostat revert to a common, traditional, manually operated thermostat? When the WIFI returns – what then happens to the thermostat and to my gas furnace?

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