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Your cart is empty.Robertshaw returns to the wall thermostat market with the simple and economical, yet powerful Pro-Series, including the 7-Day programmable, 4 stage heat/2 stage cool, WiFi-compatible, touchscreen RS10420T thermostat. The RS10420T can be controlled with the Robertshaw iOS or Android smartphone app or Alexa for maximum convenience. This thermostat also is easy to install and offers robust control features such as adjustable temperature calibration and auto changeover. An industry-leading 6 year limited warranty adds peace of mind to the built-in Robertshaw quality. Also, many HVAC contractors may find that all these features make the RS10420T one of their most popular thermostats, enabling them to reduce their truck stock. The unit also includes an intuitive contractor/technician setup menu.
Kent Shelby
July 23, 2025
Love the temperature differential settings but loses network frequently. WiFi setup poor. I'm a 30 year IT guy and know what I'm doing!
D Brooks
June 20, 2025
Replaced an old Robertshaw 96xx series heat pump thermostat with this beauty.I needed separate O/B and separate AUX/E terminals bc of an older zone control system.I've always like the feature of being able to tune the swing differential and this one does it 1/10s of a degree.Like others reported, I had network dropping issues but once I made it a static IP/reserved IP on my Eeero, I've never had a problem since. I am baffled at the false battery compartment though!
tehenson
April 11, 2025
First thing, had to put a two degree bias in it as it was off that far compared to three different thermometers. Also installed the app and it just goes away as soon as you try to connect to the thermostat…needs a lot of work. Install was easy, looks good, works good with the bias.
Bob
March 12, 2025
the non existent support from the manufacturer to remedy the connectivity causes me to dislike this device and Robert Shaw.
SuperDave
March 3, 2025
My house HVAC system needs separate O & B connections to operate properly.I have tried Honeywell, Sensi Wifi thermostats and none of them works properly to control the 2 zone system that I have.Finally I did some research and bought this Robertshaw Wifi T-stat from Amazon since the original old school thermostat was made by Robertshaw. I installed it per the instruction and the Wifi T-stat works flawlessly. No issue to connect to Wifi, just a bit tricky for non-tech folks. Although it does not have all the fancy features from Honeywell, Ecobee, Nest, etc. Robertshaw is a reputable and pretty large control company, bravo for them to finally going to the smart T-stat world. Very happy so far. Hope it lasts.
LoveWorksDotCom
November 3, 2024
I bought five of these thermostats so I could remotely monitor the temperature in various facilities. When I started buying Robershaw thermostats 15 years ago, I paid over $150 each. These were much cheaper and provide so much more.One unit was defective and the seller replaced it immediately. With today's routers, connecting the unit can be a pain because it only works on 2.4 frequency so you must make sure your router is broadcasting on 2.4 otherwise you will never connect. I had to turn 5.0 OFF before I could get a connection.Very much recommended. The app works great; allows for auto-login to make viewing the various thermostat's statuses very quickly. The app shows whether the unit is on or off; and the current temperature.I do still have problems with some of the thermostats going offline and I haven't figured that out yet, but I still recommend these thermostats.
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