This Spa Hi-Limit thermostat (aka spa reset or tub reset) is a safety device designed to prevent damage to the spa that would occur if the spa overheated. The probe of this high-limit resides in a “drywell” along with the thermostat probe. The spa high-limit will kill power to the spa equipment if the water temperature exceeds 120 degrees.
Note: The length of the lead including the capillary is 28″. Please make sure that the length will work for your repair. The manufacturer is not making them as long as they used to.