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Honeywell YTHX9421R5085WW/U Prestige IAQ Kit with Redlink Technology

Thermostat Type

Features

Control Type

Brand

Color

Model

This is a Prestige 2-wireIAQ kit with redlink technology. It is white in color. This kit contains the THX9421R5021WW/U color touchscreen thermostat, THM5421R1021 equipment interface module, and two duct sensors.

Manufacturer Part Number

Universal Product Code (UPC check)

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Notice for Quebec Customers<br><br>Protect it today, enjoy it for years.<br>Get low-cost, great value protection that goes beyond the manufacturer’s warranty, keeping your product covered when you need it most.<br><br>Protection covers:<br>• Mechanical and electrical failures.<br>• Defects in workmanship and materials from normal use.<br>• Fast, easy online claims backed by our 3-Business-Day Service Guarantee.<br>• 100% coverage for parts, labour and shipping - no deductibles or additional cost (pay $0 for approved claims).<br><br>How the Plan works:<br>1. Add a Plan to your order.<br>2. Plan details will be emailed to you after completing your purchase.<br>3. Start a claim online anytime or by phone.<br>We’ve got you covered up to the amount you paid, whether it’s a replacement, a refund or repairs.<br><br>You can cancel within 90 days of purchase for a hassle-free refund, according to your plan terms.<br>Limitations and exclusions apply. For more details, view the terms and conditions.

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Had 2 of these Wi-Fi thermostats installed with new furnaces/AC about 6 years ago. More recently, I bought the Wi-Fi gateway (RedLink) and linked both thermostats for remote access.  Easy peasy, and works flawlessly so far.

Prestige Wi-Fi thermostat

resideo.com

I installed two Prestige IAQ thermostats on my Honeywell zoned system 12 years ago. Complete with all the RedLINK add on devices (OPTIONAL) the system operation, comfort and energy management has been perfect. The Indoor Air Quality (IAQ) has allowed my family to enjoy very clean air even during high heat outdoors and heavy smoke from the wild fires. Using the app that provides remote control is clear and easy to operate. I count on the advanced notifications for filter reminder, High and Low temperatures and Humidity settings to keep me in touch at all times. Adjustable staging control allows my family to enjoy great temperature control while saving on energy cost. One of my favorite RedLINK add on devices is the wireless outdoor temperature and humidity sensor. With the outdoor sensor we get to see the actual temperature and humidity directly outside our home.
I receive excellent energy reports from the Resideo Honeywell Home app, what a great service and feature. The Prestige thermostat has an adjustable color screen completing what I call the perfect thermostat installation.

Best all around thermostat on the market!!!!

Maria

Thermostat and all the attached gadgets work fine.  It's a really complex system with quite a few pieces of equipment in the kit that seem to work together quite well to control my Lennox HVAC systems and attached humidifier units.  Two things that I wish were better.  Communication is a tad bit slow as you enter your setting in the app and/or the thermostat unit, and it takes about a minute to kick-in.  I figured it was due to all the complex set of gadgets that need to communicate with each other before the new setting takes effect.    I replaced my nest 3rd gen thermostats with this one to be able to better control the whole house humidifiers and while these thermostats do the job pretty well the app interface is absolutely terrible and needs work.  Honeywell - please model your app after nest or similar.  Those are great looking and very user friendly.  Why does your app include a ribbon for Rebates?  I don't want to see that on the main screen at all.  If interested, I will visit your website for rebates and making more purchases.  I don't want to be reminded everyday to check for "Rebates" with a perpetual ribbon that occupies a significant portion of the main screen.  Please, please fix this!!!

Expensive, OK thermostat; Unimpressive App!

As a HVAC technician I have in stalled close to 100 of these stat as well as other brands , and the stat it self has very good control of space conditions and is one of the best on the market for control and accuracy of temp, but can y'all please do something with the mobile app!! As soon as the customer see the app the are instantly disappointed and sometimes we end up having to put in another brand (the round ones) just because the customer was so turned off by the app design.

Great Stat, App is seriously lacking an update !!

Joey

I would like to upgrade my existing Prestige 2.0 made in 2015.   However it seems that the current version even though it has a lot of features, such as reading duct temperatures, its lack the more high tech features such as Geo Fencing and RedLink 3.0 that the T10 has limits its long time usefulness in my opinion.  Also I would like to see the supply and return duct temperatures displayed on the thermostat.   Now it seems according to Honeywell that these temperatures are only accessible in the Equipment Test Mode.  This is disappointing.  Tracking the temperature difference between the temperatures of the supply in and discharge out with the compressor amps can help avoid a failure of the compressor.  

This Prestige 2.0 is still the old platform and is > 7 years old.  It is showing its age.    I hope another model with these capabilities will be available.  The T10 would be great if it could be connected to an EIM so that more than one device could be controlled and if duct supply and discharge temperatures could be monitored.

Existing Prestige 2.0 made in 2015 needs upgrade

Very disappointed in redlink. The app does not support 365 programing and takes hours to upload program cycles from thermostat to phone app.

Very poor Redlink remote programing

Remote programing app states it may take and hour to upload, and may never upload. This is only 7 day programable, not 365 day that it replaced.

Not a 365 day programable unit.

Have had the earlier version of this thermostat.  Worked for a year or so then the Wi-Fi stopped working.  Could not get it to connect.  Now it is just a fancy thermostat display.  No way I would buy another one at these prices when mine did not last more than a year or so.

WiFi broke within a year

Spent 3 years constantly having to reset thermostat to get it to save the date and time. Can't use any of the “smart” functions due to this issue, then it completely stopped working saying it can't communicate with the wireless system when it's hard wired in!

Don't waste your money!

Brand new house. Brand new everything. This thermostat is terrible.  No clue what temperature it's reading as it's nearly 10 degrees off.  Been 30 days and it's going in the trash.  Wifi not standard. Very misleading features.  You can change the colors.  Your fingers will move faster than the screen- so you have to be slow and deliberate with actions.  Came to this website specifically to leave a review that this is trash

Probably good in 2008

Honeywell YTHX9421R5085WW/U Prestige IAQ Kit with Redlink Technology

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