About this sensor
This Robertshaw 24″ Single Pole Hi-Limit Sensor (275-3275-00) is a critical safety component designed for spa and hot tub heating systems. The sensor features a 24-inch capillary tube with a 5/16-inch sensing bulb, engineered to automatically shut off power when water temperatures exceed safe operating limits. This OEM-quality replacement part helps resolve common spa issues including overheating errors, freeze protection malfunctions, and heating system failures.
Built to Robertshaw’s exacting standards, this hi-limit sensor delivers reliable temperature monitoring and system protection. At Bubbles Supply, we guarantee an exact fit for your spa’s control system and offer same-day shipping to get your hot tub running safely again. Every sensor includes our comprehensive 1-year warranty for complete peace of mind. Always verify capillary length and bulb dimensions match your existing sensor before installation, and ensure proper electrical connections are secure.
