Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online
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Brand
Honeywell Home
Color
White
Item Dimensions LxWxH
1 x 4.75 x 3.5 inches
Style
Contemporary
Item Weight
0.75 Pounds


Easy operation and precise temperature control

This easy-to-operate 1-Week Programmable Thermostat helps make your home comfortable exactly when you want it. Programmable for one week, it lets you customize your schedule with four options – ‘wake’, ‘leave’, ‘return’, and ‘sleep’ – for precise temperature control and added comfort. Simple step-by-step instructions included with the thermostat make DIY installation easy.

Find the programmable thermostat for you

1-Week

Programmable 1-week LCD Screen White 4.75 x 3.5 x 1 in Batteries

T5 Touchscreen 7-Day

Programmable 7-day custom control Touch Screen w/blue backlight White 4.09 x 4.09 x 1.06 in Batteries or wired

Touchscreen 7-Day

Programmable 7-day custom control Touch Screen with backlight White 6 x 3.5 x 1 in Batteries or wired

5-2 Day

Programmable 5-2 day LCD Screen w/blue backlight White 5.36 x 3.86 x 1.08 in Batteries

5-2 Day Low Voltage

Programmable low voltage 5-2 day LCD Screen with backlight White 4.75 x 3.5 x 1 in Batteries

Product information Contemporary

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Q: Are the programming instructions on line

A: Inside the box

CGS | 5 months ago

Q: How did everyone else get the red wire in if it is so tightly screwed in? I can’t seem to …

A: A really good jewelers screwdriver, pressing down real hard and having someone else turn t…

Marty | 7 months ago

Q: Rth221b - can this be used on a 2-wire millivolt-only system? (no 24 volt transformer, no…

A: Hi there, this thermostat is compatible with millivolt systems. - Maria

Manufacturer Honeywell Home | 11 months ago

Q: Is the rth221b1039 compatable with a madine gas fired wall heater?

A: Yes. It''s two wires

Fazal baksh | 5 years ago

Customer reviews

4.4 out of 54.4 out of 5
1,763 global ratings

Top reviews from the United States

L. H.
5.0 out of 5 starsVerified Purchase
Super easy to install and program
Reviewed in the United States on February 18, 2021
Style: Contemporary
To install you will need: - regular phillips screwdriver for mounting the bracket - small flat screwdriver for attaching the wires - drill and 3/16 inch (3/32 for plaster) bit for mounting if it is not the same size as your existing fixture - two AAA... See more
To install you will need:
- regular phillips screwdriver for mounting the bracket
- small flat screwdriver for attaching the wires
- drill and 3/16 inch (3/32 for plaster) bit for mounting if it is not the same size as your existing fixture
- two AAA batteries
- breaker flipped to cut power

Installation was super easy, I just popped the old front plate off, unscrewed the four colored wires (they include wire labels if you are colorblind), drilled holes and mounted the new bracket, and reattached wires to the correct color markers.

Programming was even easier. I just cycled through and set time, then the four different temp/time settings throughout the day, then set it to run.

My previous thermostat was a round, dial-shaped Honeywell, and I hated it. It would flake out and the temp would jump around or just not accept the setting and instead not run (while looking like it was set right), which could cause the house''s temp to spike/plummet during severe weather. I do not recommend their dial thermostats, but this one appears to be exactly what I was looking for. The display is not very large, and I could see this being problematic if you have eyesight problems (old one had tall numbers and a backlight), but it will be just fine for me. If you''re looking for an extremely basic thermostat with daily (not 7-day) settings, and don''t want to spend much, this is probably just what you are looking for.

I just installed it today, so I haven''t used it extensively, but the only downside I''ve noticed is a much louder click noise when the heat turns on than our previous model. Ideally I''ll tune it out over time. (UPDATE: the click is very audible, if this is going to bother you I''d recommend a different model.)
4 people found this helpful
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tth
3.0 out of 5 starsVerified Purchase
No Swing Adjustment
Reviewed in the United States on July 3, 2020
Style: Contemporary
So-so for just a basic plain-Jane t-stat. However, I could find no mention of the "swing" feature (found in every thermostat going back to the days of Moses). The "swing" is the number of degrees between where the heater/cooler turns on and turns off. With a 1 deg swing,... See more
So-so for just a basic plain-Jane t-stat. However, I could find no mention of the "swing" feature (found in every thermostat going back to the days of Moses). The "swing" is the number of degrees between where the heater/cooler turns on and turns off. With a 1 deg swing, a cooler set at 75 deg will turn on at 75.5 deg and turn off at 74.5. The larger the swing, the less energy consumed and lower humidity level, and less wear & tear on the AC unit.

I called tech support. Not impressed. On hold for a long time. The lady I spoke with tried to act like an authority on the product, but I could tell that she was just reading information from a computer screen that mimicked the instruction manual. She had no idea was "swing" was. She put me on hold for a really long time to find out what I was talking about.

After being on hold forever, she finally comes back to tell me that this t-stat doesn''t have that feature. This is the first time in 40 years I''ve seen a stat without this feature. Important to me for keeping down power consumption and humidity in a vacant house near the Texas gulf coast.

Returning Honeywell t-stat. Seems I''m getting much more bang for my buck with the Suuwer 715 also sold on Amazon.
2 people found this helpful
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Barbara
4.0 out of 5 starsVerified Purchase
Does what I wanted :)
Reviewed in the United States on January 22, 2021
Style: Contemporary
I installed this about 2 weeks ago, to replace an old nondigital thermostat that either had me too hot or too cold. I''ve set this thermostat for a constant temp of 71 (beginning at 5:30 am) with a sleep, nighttime temp of 62 beginning at 10:30pm, and it does that... See more
I installed this about 2 weeks ago, to replace an old nondigital thermostat that either had me too hot or too cold. I''ve set this thermostat for a constant temp of 71 (beginning at 5:30 am) with a sleep, nighttime temp of 62 beginning at 10:30pm, and it does that perfectly. Our house is much more comfortable and I wish I had put this in years ago. I do wish the screen was backlit, but since I haven''t needed to change the settings, that really isn''t a deal breaker at all. At this time I''m actually considering buying another of these to replace the thermostat in our camping trailer as well :)

Installation was easy but to make it even easier, I watched some YouTube videos for replacing a thermostat (some of which were even for this exact same unit). I''m giving it 4 stars. Would have been 5 except for the lack of back light, and I wish it had come with a back plate to cover the wall where the previous unit had been. I''ve now got about a 1" strip above the new unit that is unpainted, so I either have to find a matching paint or remove this unit to put a back plate on. Not a huge deal, but still an inconvenience
2 people found this helpful
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paul rother
5.0 out of 5 starsVerified Purchase
For my Chickens - Simple
Reviewed in the United States on August 13, 2021
Style: Contemporary
I''m a DIY type person and needed a thermostat to automatically turn on the cooling misters for my chickens when it gets hot. This worked out great for that. It''s simple, and thus easy to program and adjust. There is a secret menu to change from F to C, and from 12 hr... See more
I''m a DIY type person and needed a thermostat to automatically turn on the cooling misters for my chickens when it gets hot. This worked out great for that. It''s simple, and thus easy to program and adjust. There is a secret menu to change from F to C, and from 12 hr clock to 24, amongst a few other things, so don''t throw away the manual, otherwise it will be next to imposible to change those things. There are four time slots, assuming for working people named: wake up; leave; come back and sleep. I used a (2 wire auto return) US Solid motorized valve with a small 12v battery and solar charger for power. The thermostat requires two AAA batteries, which i replaced with a 3.3 voltage regulator, so i never have to change batteries. Note the range of both heat and cooling is from 50F to 99F. (I don''t know what the range is for C, it might be greater, i don''t know.) There is an HEAT-OFF-COOL switch, but you can''t turn it off for a select time period as someone posted. In my case i''m dealing with temps in the 100+ plus range so 99 is clearly not off. But if it''s greater than 99, i clearly want the misters on.
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Scott
4.0 out of 5 starsVerified Purchase
Seems fine for the price
Reviewed in the United States on January 8, 2021
Style: Contemporary
I needed a new thermostat because one of my previous ones, also a Honeywell, started mixing up my day parts. It''s supposed to go from Wake to Leave to Return to Sleep, but at some point it started going Wake, Leave, Return, Wake. Had to manually adjust it before sleep every... See more
I needed a new thermostat because one of my previous ones, also a Honeywell, started mixing up my day parts. It''s supposed to go from Wake to Leave to Return to Sleep, but at some point it started going Wake, Leave, Return, Wake. Had to manually adjust it before sleep every night which became super irritating on the few occasions I forgot.

My system doesn''t appear to be compatible with most smart thermostats, and I have four zones anyway, so I went with a cheap and simple replacement.

I''m back in business with my day parts, everything seems to work fine. The quality of the unit isn''t amazing, but considering once it''s programmed, all I really ever need to do is push a few buttons here or there, I expect it to last a while.
One person found this helpful
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Mongero
5.0 out of 5 starsVerified Purchase
Perfect for my needs. Backplate compatible with old thermostat
Reviewed in the United States on November 2, 2020
Style: Contemporary
The Honeywell Model #RTH111B came with my house. It''s backlit, but non-programmable. I wanted something programmable as I want the heat turned down when I sleep. This one was ideal as the backplates are identical and all I had to do was swap the fronts and program it. This... See more
The Honeywell Model #RTH111B came with my house. It''s backlit, but non-programmable. I wanted something programmable as I want the heat turned down when I sleep. This one was ideal as the backplates are identical and all I had to do was swap the fronts and program it. This one isn''t backlit but it''s easy enough to read. I priced my old one and it''s actually more expensive than this one. If you have a Honeywell and want more features pop it off and take a look at the backplate. Chances are you can upgrade without having to change it.
One person found this helpful
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CCSpygrl
4.0 out of 5 starsVerified Purchase
R Terminal Screw Extremely Difficult to Unscrew. Otherwise, Works Well.
Reviewed in the United States on July 20, 2021
Style: Contemporary
The R and Rc screws were recessed into the terminals. Ultimately, after an hour to manually trying to pry the little screws out with a small precision flathead (the rest of the screws besides the R and Rc came out very easily), I had to attach my little flat head... See more
The R and Rc screws were recessed into the terminals. Ultimately, after an hour to manually trying to pry the little screws out with a small precision flathead (the rest of the screws besides the R and Rc came out very easily), I had to attach my little flat head screwdriver to the electric drill to loosen the screw to get the R screw out. Ultimately, it worked. After they were unscrewed, installation was extremely simple. Another thing is that the Amazon description specifies that you need double A batteries. However, the actual thermostat requires two triple A (AAA) batteries (not included).
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A-Lo
3.0 out of 5 starsVerified Purchase
8 months in and 1 needs replaced
Reviewed in the United States on August 10, 2021
Style: Contemporary
I bought 2 of these and easily installed both for each of my units. However, one has started to malfunction. It will go blank as if it has no batteries/power. I replaced the batteries and not even a month later, the screen went blank again. When this happens the air... See more
I bought 2 of these and easily installed both for each of my units. However, one has started to malfunction. It will go blank as if it has no batteries/power. I replaced the batteries and not even a month later, the screen went blank again. When this happens the air will still run, but it gets very hot. I would hate for this to happen when I am not home as it could cause MAJOR issues. The other thermostat has been working flawlessly. I gave it 3 stars b/c I already need to replace one, but the other is working great.
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Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

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Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

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Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online

Honeywell lowest Home RTH221B1039 RTH221B new arrival Programmable Thermostat, White online