Search  for anything...
Honeywell

Honeywell TH4210U2002 T4 Pro Programmable Thermostat 2H/1C 1H/1C

Based on 330 reviews
Condition: New
Checking for the best price...
$76.94
Holiday Deal · 55% off was $170.00

Buy Now, Pay Later

As low as $12.82 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

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.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Voomi Supply
Arrives Nov 17 – Nov 19
Order within 19 hours and 2 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

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

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

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. ... show more
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
Review Image by lg212
Review Image by lg212
Review Image by lg212
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. ... show more
Reviewed in the United States on February 17, 2024 by lg212
How it works
Checking for best price...