Honeywell Home RCHTSENSOR-1PK, Smart Room Sensor works with T9/T10 WIFI Smart Thermostats

After our furnace died during the coldest week yet this winter, we had to finally bite the bullet and replace it. The new one is crazy efficient and works so much better than the old one, but that in itself raised a new problem where some rooms are now sweltering while others are lagging slightly behind. Enter this cute like smart sensor. We placed one in the room furthest from the thermostat and within the first day, noticed a big difference and figured we'd add one more for the opposite end of the first floor. We then set the thermostat to average these readings. You can also have it adjust for only when rooms are occupied, or manually override very easily through the interface, but for us the average feature is working best. You can add up to 20 sensors, which I feel would be crazy overkill for our 1800'ish sq/ft first floor, so we'll see how this do over the rest of the winter. Overall very pleased with easy installation in the thermostat interface and if you can attach a command strip, then mounting them in the desired room is a breeze. I'll revisit the review if anything strange comes up.

Works very good! Helps keep room at same temperature as thermostat.

Easy to install and configure. The Resideo app allows sensor control to be modified on the fly as well as per schedule. The devise is relatively small with no annoying display so it can be incorporated into many rooms without distracting from their appearance. The averaging of temperatures among rooms makes the functionality a must have. The comfort these provide makes it well worth the money.

These do not work with series 1 or 2 earlier T9 models. I tried 2 new ones before I figured out they won't pair. You have to order earlier sensors directly from Honeywell. The series number is located at the end of the model number on the back of the thermostat. The old sensor # ends in 2002. I've ordered from this listing twice before in 2024 and they used to be the old sensor. You will get a red solid light and no pairing when it's the wrong one.

I wasn’t expecting a dramatic difference, but this little sensor really helped balance the heating in my home. After replacing our heater, the installer set up a new thermostat and included one remote sensor—but it didn’t quite solve the uneven heating across rooms. I decided to add another sensor myself, and honestly, the improvement was noticeable. The extra sensor made a big difference in creating a more consistent temperature, especially between floors. Now, I’m even considering adding a third one to help regulate the heat in our finished basement. Setup was simple, and it paired easily with our Honeywell thermostat. If you’re dealing with hot and cold spots, this sensor is absolutely worth trying.

This device is actually great when it works. I have two of them connected to my T9 thermostat and they work as intended. The problem is the fact that the manufacturer made changes to the thermostat and/or the sensor since I originally purchased the T9 in 2021, and the extra sensor in 2023. There is no way of telling which version you are buying by looking at the product description and the packaging. I called their customer service when I was not able to establish a connection. The rep wanted to start a video call so she could see the labeling on both products. However, their video call system did not work on my phone so I was asked to email pictures of both as well as proof of purchase. I did not understand why they would need the proof of purchase just to tell me if the two devices were compatible. She finally agreed to check compatibility first and then ask for proof of purchase, if needed. It turns out they need it for a possible replacement. I still don't get it as I bought this on Amazon and not from the manufacturer directly. I emailed the pictures, was asked for another picture, i.e., the label inside the battery compartment of the sensor which I sent. By the way, customer service answered the phone right away so I give them credit for that. The rep needs to improve her listening skills and use her judgement instead of just following the script she is given. For instance, I told her that the reset procedure listed on the company's website (press the connect button for 15 seconds and wait for the orange light) did not work on my device. She could have easily asked me for the number printed after the model number instead of asking for pictures. That would have solved the problem. After that I did some research online and realized that this is a known issue: Series 1 of the thermostat is not compatible with series 2 of the sensor so I returned the product. As always Amazon was great with the return request. In summary, do not buy this if you bought the T9 couple years ago and would like to add another sensor, like I did. Resideo website has the old version available for purchase so I may buy one. In my opinion, it is a poor manufacturing practice to make changes which are not backwards compatible.

If you have a home with Honeywell T9 or T10 Thermostats, this is a great remote sensor for nearby rooms. In my case, I own a vacation home in Sun City. My home, a Voyage model has two bedrooms and three heating/cooling zones. The thermostat in question is in the common hall just outside the guest bedroom doors. When my family visits, they close the doors at night, making the thermostat unable to read the temperature in the two rooms. The sensors (I needed two) are very easy to set up and give them priority over the main thermostat. I just installed them this last week and they worked exactly as I hoped. After the family left, I returned priority to the main thermostat. Highly recommended!

Works perfectly. Helps regulate the cold Spot in the house.

Muy bueno pues detecta la presencia humana y la temperatura en el área y se complementa perfectamente con el termostato inteligente T8 .

for T9 , works well

Our thermostat unfortunately is placed where it gets morning Sun for part of the year, which has always made it think the home was warmer than reality on cold February mornings! So.. enter these remote sensors at C$24/ea. I placed one out of direct sunlight in the main living area, and used the T9 thermostat's touchscreen to set it up and to use it rather than the sensor built-into the thermostat itself. Problem solved, and the sensor is in a better area of the home as well. Got a second sensor for the master bedroom area, too. These are easy to install (special double sided foam mounting tape included in the package), and use a dedicated RF link to/from the thermostat rather than WiFi (the thermostat itself also does use WiFi). Recommended at C$24/each! I might get more of them..

AAA

I am writing to express my dissatisfaction with the Honeywell Home RCHTSENSOR-1PK Smart Room Sensor. Unfortunately, the product has not met expectations and does not function as advertised. The sensor only detects motion and fails to recognize occupancy if someone is sitting at a desk working or lying still in the room, such as when sleeping. This limitation significantly reduces its usefulness, as it does not effectively account for actual room occupancy under normal living conditions. This crucial detail was not highlighted in the product description, leading to a misleading purchase decision. I believe this omission is unacceptable, as the product cannot deliver the intended value in real-world scenarios. I kindly request a refund for this product, as it does not perform as expected and fails to align with the advertised functionality. Please let me know the steps to initiate the return and refund process. Thank you for your understanding. I look forward to your prompt response.