Resideo Reviews 35

I can't registered they said I been already registered

I have been using Honeywell hydronic zone valves for 29 years. The zone valves that were made pre-Covid seemed to last forever. The ones that are made either during Covid or after Covid are junk. I had a 52 unit apartment complex that I changed out all of the zone valves three years ago and currently I have replaced at least 10 of the new powerheads

Uk=much the same customer services and warranty as in USA.Purchased a 2 port valve and failed in 6months,the original supplier was hesitant in swapping so I bought a new one.The Uk manufacturer were just as hopeless arguing the toss over a £79 part that probably cost them a tenner.Very bad will now use a competitor part,noting I have over 80 of these in my systems.

Absolutely useless smart thermostat. I would give zero stars if possible. It cannot cope of the WiFi drops and has been down now for several days with the support team no use at all. They do not know what they are doing and do not call back when they say they will. Finally yesterday they admitted the connection to WiFi is a known problem with the tr6, but they do not care enough to fix it.

They make it impossible to complain or talk to someone who knows what they are doing. Terrible service, terrible products.

I have used Resideo before and unfortunately I am dealing with the same issue again years later.
After moving house and installing a new boiler, the thermostat could not be reconnected because it was still registered to a previous home in the app. I deleted the old home, assuming the device would follow. It did not. The thermostat remained locked on Resideo’s servers, invisible in the app, and impossible to remove or re add.
There is no clear guidance in the app warning users that deleting a home without first removing the device will permanently orphan it. There is also no way to resolve this from within the app. The only solution is contacting customer support to manually release ownership.
For a modern smart heating system, basic device ownership management should not require backend intervention. This is a fundamental design flaw.
I have now chosen to replace the thermostat entirely rather than repeat this process again in the future.
The hardware works. The account management system does not.

The Lyric T6 thermostat offers few user-friendly options but lacks essential features such as holidays, days as Sundays, etc.

User support is very bad.

I requested an API several times, but emails are not answered, and no API send as well.

01-02-2026: still no news from resideo nor an API
reiceived, this is very bad support.

02-04-2026: still nothing heard or whatsoever, very bad support, next time no more Resideo/Honeywell for me

Purchased eight Residio smoke detectors less than three months ago. One was replaced by Resideo within two weeks because it went off without cause. Now, approximately ten weeks after installation a second detector went off at 5 am and again at 8 am even though I removed two of the batteries.

Thermostat failed in less than one year. Purchased from BestBuy with receipt. Professional installer confirms failure. Resideo phone service directed us to send documentation. We did. No response after several weeks and follow-up emails.
Plus the product is very cheaply made which is the cause of the failure.

Added note. Resideo did respond after another phone call and sent replacement. It seems like they make it difficult on purpose.

Wait until 10 am EST to get support for a thermostat app that does not work? Ridiculous. Honeywell should demand better of third party app makers. A simple scheduling task does not work so the system wastes energy and time in the meanwhile.

Customer service leftme Probably the worst customer service I’ve ever experienced.
The representative sounded annoyed from the start and had no interest in helping. I was simply asking how often the thermostat’s ambient temperature sensor updates, as the display seemed stuck for hours. Instead of answering, she sighed and kept repeating, “If you’re not happy, return it to the merchant.”
She refused to explain or offer any technical advice, not even a suggestion for reset or calibration. Her tone was unpleasant and dismissive — it felt like she just wanted to hang up.
This wasn’t technical support at all. I left the call feeling frustrated and disrespected. I wasn’t asking for a refund, just a clear answer — and got none..

Always was happy with my Resideo T6 thermostat.
But then the T6s were made obsolete bij Resideo without letting customers know.

I was struggling to set everything up again, even with help from the Q&A on their own site and nowhere did they share this information.

It' s bad enough to do this, but not sharing the information with your customers makes it so, I will never buy anything from this fraudulent feeling company again.

Wanted to put a brand new C1 to use I bought several years ago as spare.
Can’t connect it because according to Resideo the firmware is too old. And it can’t update if it can’t connect.
They told me to trash it and buy something new.
Disgusting! 🤮

The device did not last 10 years, customer support absolutely crap, wasting your time. Please see below.

Could you please confirm whether the issue also occurs when the device is in normal mode and located outside your home?

Additionally, kindly ensure that the battery has been inserted correctly. To help us better understand the situation, we would appreciate it if you could send us a short video demonstrating the issue.

If I could give zero stars I would. Don’t buy this product. There is no customer service. The phone number provided Doesnt work and they insist it does. It take about two days for them to answer emails and then they just ask patronising questions. If I had known this beforehand I would never have bought this system. Please don’t buy this system. It’s expensive and you have no product support available. It’s a complete con job

My Honeywell central heating programmer has never worked as it should despite my plumber and I following the printed instructions to the letter.

Today I spent an hour trying to find a telephone number for Honeywell UK Technical Support that answered - there a several on the internet - none of them worked (not even the American and Canadian ones!).

I did find the Support page on Resideo's UK website but it has no technical support contact phone number, just a chat page that doesn't work and an enquiry form which is totally unsuitable for a discussion about complex technical issue.

My brand new Honeywell Central Heating Programmer is going in the bin and I will never buy a Honeywell product again.

Contacted support to find out how to get replacement faceplates for my Evohome controllers. Originals have gone an awful yellow colour but replacements are discontinued. Support told me to “try the internet”. When I explained I had, and that all retailers say these parts are discontinued, my case was closed with no further explanation. The controllers are still an active product, which means the faceplates must also be manufactured. Resideo don’t care though. They are the worst thing that ever happened to Honeywell

I am trying to get a RMA number, for a smoke detector. They sent me a device with a bad MAC address. I cannot register the product in set up process. Resideo will not issue a RMA. This is the worst customer service experience I have ever had with a company.

Residio refuses to reimburse us for labor charges in the amount of about $1,800 for replacing 3 defective whole house dehumidifiers. The 3 units failed within the last 4 years! Each time we incur over $500 in diagnostic and replacement labor charges. The humistat is defective in each unit! Be aware of buying any unit with a Honeywell labor as the warranty is via Residio.

Well it took a few emails / quite a few to get our First Alert smoke detectors replaced under the 10 year warranty . Our contact was Connie who followed through till the 3 First Alert Smoke Detectors delivered on 6/05/25.
Connie was a good example of what customer service should be her follow through once involved was reassuring.
When you have a product that is installed in most new homes under the building code, a product that saves life's this company honored their warranty.
Thank you Connie and all those involved in replacing our First Alert Smoke Detectors.
John & Debbie