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- – No impact on credit to apply
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30-day returns
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
In Stock.
Arrives
Nov 17 – Nov 19
Recently Viewed
At a glance
- Condition
- New
- Model
- TH4210U2002/U
- Dimensions
- 6.3"D x 5.2"W x 2.4"H
- Weight
- 12.2 oz
- Color
- White
- Material
- Acrylonitrile Butadiene Styrene (ABS)
- Controller Type
- Push Button
- In the box
- ThermostatUWP mounting systeminstallation (J-box) adapterfilter change reminders
Features 3
- Uses the UWP mounting system that's standard across all T Series thermostats
- Simple push-button functionality, LED backlight, medium display with soft key controls, Filter change reminders
- Includes thermostat, UWP mounting system and installation (J-box) adapter
Specs 34
| Brand | Honeywell |
|---|---|
| Model Name | TH4210U2002 |
| Product Dimensions | 6.3"D x 5.2"W x 2.4"H |
| Controller Type | Push Button |
| Special Feature | Programmable |
| Additional Features | Programmable |
| Specific Uses For Product | Heat pump, conventional heating |
| Temperature Control Type | Programmable |
| Connectivity Technology | Wi-Fi |
| Power Source | Ac/dc |
| Voltage | 24 volts |
| Display Type | LCD |
| Control Type | Button Control |
| Control Method | App |
| Connectivity Protocol | Wi-Fi |
| Mounting Type | UWP |
| Number of Batteries | 2 AA batteries required. |
| Color | White |
| Shape | Rectangular |
| Product Style | Simple |
| Material Type | Acrylonitrile Butadiene Styrene (ABS) |
| Finish Types | Matte |
| Brand Name | Honeywell |
| Model Number | TH4210U2002/U |
| UPC | 085267187336 |
| Manufacturer | Honeywell Home |
| Number of Items | 1 |
| Unit Count | 1 Count |
| Number of Packs | 1 |
| Item Type Name | TH4210U2002/U |
| Manufacturer Part Number | TH4210U2002/U |
| Item Dimensions D x W x H | 6.3"D x 5.2"W x 2.4"H |
| Item Weight | 12.2 ounces |
| Specification Met | reach |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 17 – Nov 19
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Thumbs 👍🏾
Very good product and working well with my unit
Reviewed in the United States on July 28, 2026 by Regina Gasque
You can change the advanced settings to change automatically between air conditioning and heating
So far so good, easy installation. If you want to get to the advanced settings so it automatically goes from air conditioning to heating this is what you do. At the home screen press the menu and + buttons and hold until the screen changes. Once it changes get to the 300 setting and change the value to 1. Move to the end of the settings or exit and it should save.
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Reviewed in the United States on August 4, 2026 by Thomas Martens
Two thumbs up
This one was recommended by my HVAC guy. It’s been working fine for me. I would recommend if you dont want anything fancy. It does the job.
Reviewed in the United States on May 7, 2026 by Mary Lee Smith
Honeywell thermostat
This thermostat is so easy to use. I used it as a replacement from an older model (not Honeywell). Easy to program. Just set it and forget it!
Reviewed in the United States on July 26, 2026 by Diana Bradley
It’s a Thermostat
It’s a thermostat. It regulates the amount of thermal energy transferred by my compressor and evaporates. It does well
Reviewed in the United States on August 11, 2026 by Bryan Hatch
Great value
We needed a new thermostat and this one was perfect. It was easy to change out and does the job.
Reviewed in the United States on August 23, 2025 by Casey Rice
Honeywell Thermostat
Honeywell thermostat needed to be changed needed same model works great!
Reviewed in the United States on August 4, 2026 by Amazon Customer
Must be installed by professional to validate warranty
Came recommended by AC company, because the previous thermostats died. However the Honeywell company offers a warranty ONLY if installed by a licensed professional, which I found out by speaking with Honeywell. I had asked the seller about a warranty because Amazon often sells warranties with other products. They did not know. Well the product was installed by McGowens Air Conditioning company employee. However at this point, I would not recommend the product. It is faulty and does not work properly. As you can see by the photos below the product does not work. In the middle of summer a,home in Florida that is set to be at 70 degrees would be extremely hot at 78 degrees. Something is very wrong with this product. I reached out to the seller and have not heard back,and I called the well. So far no response from either. So word of advice. Save the box, and all receipts to send into Honeywell. Another thing the product box includes the cover mounting plate. And that is not listed on the seller’s website nor shown in photos, (I did not watch the videos). Mounting plate shown in my photo. Recommended by Amazon to buy cover mounting plate which I did based on the recommendation. They were returned. As far as the product, time will tell. Fingers crossed.
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Reviewed in the United States on February 17, 2024 by lg212