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

I got this to work with the Honeywell T9 thermostat, as a second sensor. The T9 averages between the two sensors, and I can set priority between the two sensors and the main thermostat. So far it’s working well to provide more even heat with less temperature swings. I’m considering buying more, but wish they were a little less expensive.I’m worried that these will stop working, based on reviews, but so far so good.

Easy to setup, and allows me to better control the temperature in a room far from my thermostat.

I have two ducted Mitsubishi inverter heat pump systems using MHK2 sometimes also known as MRCH2 thermostats. The upstairs system had the thermostat located in a poor location especially in winter. It resulted in the two bedrooms upstairs being about five degrees colder than the set point. I didn't want to put the thermostat intself in a bedroom but I needed to have a temperature sensor in one of them to read the temperature there. I temporarily moved the MHK2 to one of the bedrooms (it is wireless so easy enough to do) and confirmed that reading the temp in one of the bedrooms would get me to where I wanted to be.A few Google searches found some reddit threads that confirmed this sensor would work with the MHK2 even though it isn't listed as compatible. I ordered one from Amazon and can confirm it worked great. Download the MHK2 instructions on pairing this and setting it up (it is wireless). You basically need to sync it with the Redlink controller on your unit (which thankfully does NOT unsync the MHK2). Once synced you need to got into the MHK2 setup menu and select using this sensor (you can either use this remote sensor only--what I am doing, or an average of this sensor and the MHK2 sensor).

Good connectivity, love those thermostat system

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.

Have multiple of these installed in house. They work really well and I have always liked Honeywell. Will always deal with them because of quality. Item was shipped fast and very happy.

I love the Honeywell T9 thermostat and these smart sensors, they have saved me a lot of money in my AC bills each month. I ordered a new sensor recently for another room and couldn't get it to sync with the thermostat. I learned that the units have different series numbers, and some are not compatible with each other. If you're having issues getting the sync, you can call the company to confirm you have the correct series.

works very good!