Engineered with superior materials that outperform standard competitors, this auto reset thermostat switches ensures long term reliability for continuous pool heater operations Install this high limit switches in residential pools, commercial hotel spas, or fitness center heating systems to maintain safe water temperatures and equipment damage from thermal overload The 006725F Auto Reset 135F High Limit Thermostat switches provides stable overheat protections for pool heaters ( models 206A & 207A), automatically cutting power at 135°F to overheating and resetting once temperatures normalize Featuring precisions temperature control with a high limit setting up to 90°C and a ±0.01mm tolerance for consistent, this switches uses high temperature resistant and metal components for durability in extreme environments This essential pool heater thermostat component is designed for homeowners, hotel maintenance staff, and fitness center technicians managing 206A / 207A pool heating systems