Honeywell Home RTH221B1021 RTH221B Programmable Thermostat, Large, White

Honeywell Home RTH221B1021 RTH221B Programmable Thermostat, Large, White
Model: RTH221B
(74)
2 stores
1 Products

Product Details

Product DescriptionYou set it up to adjust the temperature when you are away or asleep---times when you donât necessarily need to heat or cool your home to optimum comfort---and your heating and cooling equipment runs less. This one-piece thermostat has one easy program for all days of the week (4 periods - wake, leave, return, sleep). Simple and effective use and performance. From the ManufacturerA Honeywell programmable thermostat can save you significant money off your energy bill. You set it up to adjust the temperature when you are away or asleep---times when you donât necessarily need to heat or cool your home to optimum comfort---and your heating and cooling equipment runs less. This one-piece thermostat has one easy program for all days of the week (4 periods - wake, leave, return, sleep). Simple and effective use and performance.

ONE WEEK PROGRAMMING: Set one identical program for the entire week with four program periods per day including wake, leave, arrive and sleep. PRECISE TEMPERATURE CONTROL: Precise temperature control of plus/- 1 degree Fahrenheit DIGITAL DISPLAY: Easy-to-read digital display with an intuitive interface for one-touch access to setpoint temperature EASY INSTALLATION: Easy to install yourself and basic operation keeps programming simple REMINDERS: Built-in battery change reminders (2 AAA batteries are required for operation) SET POINT RETENTION: Set point is retained in memory in the event of a power outage DISPLAY OPTIONS: Fahrenheit or Celsius; 12 or 24 hour clock. Note: This thermostat is not backlit. OVERRIDE OPTIONS: Permanent and temporary override capability COMPATIBLE WITH: Heating, cooling and heat pumps without auxiliary heat options Does NOT work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling. For indoor use only.

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Last Updated: 2025-10-18 03:16:02

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Product Specifications

Technical Details

Manufacturer -
Brand Honeywell
Item model number RTH221B
Color White
Weight -
Height -
Depth -

Additional Product Information

Product Id 879787
User Reviews and Ratings
3.1 (74 ratings)
3.1 out of 5 stars
UPC 085267311779

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Honeywell Home RTH221B1021 RTH221B Programmable Thermostat, Large, White
Reviews: 74
app.ratings: (74)
Price:
$45.12 Visit walmart

Top User Reviews and Ratings (10 total reviews)

(1)
Reviewed in the USA on Aug 17, 2025

Set thermostat at 73 degrees. Temp go to 74 degrees. Air conditioning turns on. Temp hits 73 degrees but air conditioner stays on until the temp reaches 72 degrees. The heat part of the thermostat works the same way!

Anonymous • Review provider: walmart.com
(4)
Reviewed in the USA on May 15, 2025

I've had this thermostat for about a year now. I original had a nest thermostat and while I really liked it, it would not stay connected to my phone. I think I kept zapping it with static electricity and it would make the Wi-Fi part in it go out. So I just bought something simple. I've read a lot of the reviews and I have not had any of the issues others have had from what I remember setting it up a year ago it was fairly easy. my only issue with it is there's no backup light and I can't figure out how to get one to turn on. It sucks in the middle of the night trying to see what the temperature is at. I have to use my phone or turn on some light.

Anonymous • Review provider: walmart.com
(1)
Reviewed in the USA on Nov 30, 2020

Have had this product over a year and do not have one good thing to say about it. Started having problems right after purchase. Waking up to freezing temperatures when settings are all correct, this thermostat does not regulate heat or respond to temperature changes in the home.

Anonymous • Review provider: walmart.com
(2)
Reviewed in the USA on Oct 20, 2020

Bought this a year ago and worked fine. Now it's not sticking to the schedule. For one evening (home from work) programmed time, it heats 90 minutes early. Everything is programmed correctly, didn't happen first season ‘heat' was used. But we just switched over from AC to heat and it's heating too soon for this setting every day. Who knows might be doing the same for another setting but we are asleep during the first heat up period.

Anonymous • Review provider: walmart.com
(1)
Reviewed in the USA on Aug 28, 2020

I moved into an apartment that has this thermostat and it has been a nightmare. First there was no manual provided by landlord and then trying to find online was impossible cuz it kept pulling up other models or trying to locate a retailer. It says how to set current time and day but apparently day isn't important cuz it skips and goes straight to programming which I wasn't trying to do. And it seems impossible to set a weekly schedule when you can't change for weekends since no day available. I also have never seen the low battery light and went out of town for 2 weeks in the summer in Phoenix and it died. I came home to a 97° house at 1030pm. I had to wait hours til cool enough to sleep and had to throw out lots of baking products since they melted. Really hate this system and would not recommend to anyone. Unfortunately I don't have a choice.

Anonymous • Review provider: walmart.com
Showing 1 to 5 of 10 reviews
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