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Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White

3.8 3.8 out of 5 stars 21 ratings
$300.00
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Purchase options and add-ons

Brand Honeywell
Controller Type Hand Control
Special Feature Auto Changeover, Programmable
Color White
Specific Uses For Product Heat Pump

About this item

  • Control heating, cooling and IAQ equipment with only 2 wires at the thermostat
  • Smart Schedule - programs in seconds for any lifestyle
  • Red LINK wireless communication
  • Precise temperature control (+/- 1 Degrees Fahrenheit ) for reliable and consistent temperature
  • Controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in a conventional system.

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Product details

  • Product Dimensions ‏ : ‎ 4.5 x 0.9 x 3.5 inches; 8.8 ounces
  • Item model number ‏ : ‎ THX9421R5021WW
  • Date First Available ‏ : ‎ December 11, 2014
  • Manufacturer ‏ : ‎ APR Supply Co.
  • ASIN ‏ : ‎ B00YXT60V2
  • Customer Reviews:
    3.8 3.8 out of 5 stars 21 ratings

Product Description

The Prestige IAQ thermostat is a 2 wire high definition color touch screen thermostat, 7 day programmable and selectable for residential or light commercial use. Controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in a conventional system.

Top Brand: Honeywell

Highly Rated
100K+ customers rate items from this brand highly
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From the manufacturer

B00YXT60V2

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Product Features
  • High-gloss acrylic frame
  • Seven day programmable
  • Easy to program and use
  • Self-monitoring diagnostics
  • On-screen or email reminders for filter replacement
  • Easily control multiple buildings from a PC, tablet or smartphone

Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White

THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White

The Prestige IAQ thermostat is a 2 wire high definition color touch screen thermostat, controls up to 4-stages of heat and 2-stages of cool in a heat pump system.

Three sets of Universal IAQ contacts to control humidification, dehumidification, and ventilation. Four sensor inputs for wired sensors or dry contact devices.

Works with the Equipment Interface Module and RedLINK accessories including the RedLINK Internet Gateway.

B00YXT60V2_Banner
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About Honeywell

Honeywell is a Fortune 100 company. In 2018, Honeywell ranked 77th in the Fortune 500. The company has been an innovator, constantly creating more solutions for building smarter, more sustainable solutions. Honeywell has a diversified portfolio of manufacturing products that have become synonymous with high efficacy, quality and trust. From manufacturing residential thermostats to working with armed forces or collaborating with NASA for space shuttle technologies, Honeywell continues to expand its range of offerings that also includes heating & cooling devices, air quality control systems, and safety/security solutions that are utilized across homes, workplaces and industrial locations.

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Customer reviews

3.8 out of 5 stars
3.8 out of 5
21 global ratings

Top reviews from the United States

Shawn Heydorn
5.0 out of 5 stars 2 wire setup, EIM, and wireless sensors all seperate
Reviewed in the United States on November 10, 2017
Verified Purchase
This thermostat is a commercial 2 wire only device, a seperate EIM THM5421R1021 is needed to control heating, cooling, humidity, dehumidifier, and ventalation options. Wireless sensors and redlink gateway work with this thermostat sold seperate.
7 people found this helpful
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Scott Wilson
4.0 out of 5 stars Great thermostat
Reviewed in the United States on October 5, 2022
Verified Purchase
Our house had an older Honeywell thermostat that was no longer supported or had parts for. It was an early version of a smart thermostat but the digital display started to go bad and couldn’t be read. We had 3 companies come out and one had a different thermostat suggestion which I later found out wouldn’t have worked. The other company just said why not replace your 24 year old furnace and A/C with a new one and a thermostat will be included. The 3rd one did some research and recommended this one. He said I could buy it and they would install it and sent me a reasonable quote to do so. I started looking for this thermostat and quickly found out it had supply chain issues and was available no where that you would normally find items like this. For some reason I thought oh well I’ll check Amazon and there it was and a reasonable price. I purchased it and then got nervous because it took so long for it to go from ordered to shipped but finally it did and showed up a few days later. The HVAC guy made a special trip over to make sure it was the right one and it was. This thermostat must be installed by an HVAC professional and generally isn’t even sold to anyone but a professional. The HVAC company scheduled the install for a few days later and did find we needed one additional part but it was a reasonable price and they had it in stock. It took them about 1.5 hrs to install the whole thing and is working great. This thermostat is Alexa compatible which I have no interest and with the addition of another part I bought from another company it is wifi capable. I also added an outdoor temperature and humidity sensor which those show up on the thermostat. From what I could tell the HVAC techs had no issues installing and setting this product up and registering it with Honeywell. The internet access is nice but it’s actually easier to program from the unit itself. But it’s a nice feature to have if you’re away from home and find your home is in a freeze warning and you shut your furnace system off for the summer, you can turn it on and set up your temp. I think it’s a great product but it is not a DIY system. The only way the warranty is activated is by the HVAC folks activated the thermostat on the Honeywell system. Our biggest reason for going with this thermostat was that we have a humidifier and I found there are a lot of smart thermostats out there but they won’t control your humidifier.
One person found this helpful
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The JUDGE
5.0 out of 5 stars GREAT TSTAT
Reviewed in the United States on July 26, 2020
NICE!
One person found this helpful
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George
2.0 out of 5 stars sold as new not new or its defective
Reviewed in the United States on July 26, 2023
Verified Purchase
touch screen not functioning properly. sold as new not new or defective.
One person found this helpful
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Stephanie J Matusky
3.0 out of 5 stars ... workable on my unit the ad for product needs better breakdown of
Reviewed in the United States on April 26, 2018
Verified Purchase
not workable on my unit the ad for product needs better breakdown of uses
One person found this helpful
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Dawn Rase
1.0 out of 5 stars Bad quality product keeps dying
Reviewed in the United States on August 29, 2019
Verified Purchase
This product keeps failing to work. I have recieved 6 of these over the past 2 years each about $250 and they only last from 1 to 9 months. The last one I had installed for 37 days and was told by Amazon that since it was outside of the 30 day window they couldnt do anything and I had to contact Honeywell. Honeywell told me that I had to contact Amazon. Amazon then told me that I would have to pay a restocking fee in order to return meanwhile I am at home with over 80 degree weather, no central air, 2 asthmatics in the house, and me with my other breathing and health issues. Oh yeah dont buy this product unless you are a contractor because apparently that is the only way Honeywell will even talk to you about this product.
3 people found this helpful
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Paul Neilsen
2.0 out of 5 stars Thermostat
Reviewed in the United States on November 9, 2017
Verified Purchase
A quality thermostat but I returned it because it is a 2 wire control that needs an interface for operation. I only gave it 2 stars not because of quality but because I couldn't use it.
2 people found this helpful
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brandon
1.0 out of 5 stars Used
Reviewed in the United States on October 5, 2020
Verified Purchase
It was used..
One person found this helpful
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