These sensors are compatible with any 5.0 and later firmware. To find out what firmware your CoolBot is, unplug the CoolBot from the wall and plug it back in. Within the first 5 seconds it should blink “C.b #.#”. If your CoolBot is pre 5.0, these sensors will not work, please call us at 888.871.5723 to ask about our trade in program.
All CoolBot replacement parts qualify for FREE SHIPPING.