Feature 【Function】Temp/Hi Limit Sensor serves as a safety device, monitoring and regulating the temperature of our spas. Once overheating spa issues occur, it shuts off the heater. Therefore, if you are experiencing any spa temperature issue, don’t wait to get this Temp/Hi Limit Sensor to resolve it. Very sure this sensor will effectively prevent water from becoming too hot and better improve your spa experience. 【Fitment】Will fit for Balboa Spa Heater M7 System 30344 30042 30382. Also will replaces 304988, 32016, 34-0202-K, 34-0202A-K, 52016, 53605, 9711-101, 9711-109, 9713-101, BAL32016, BB32016, BX9983, RME-30344A .