3977393 Thermal Cut-off Switch. 3977393 Thermal cut-off switch safety assembly is 309F, Compatible your existing fuse is 325F. 3977767 Cycling Thermostat. 3387134 High Limit Thermostat. 3387134 High limit thermostat when the cycle thermostat temperature failure, the temperature can not be adjusted, when the temperature reaches 155 degrees Celsius, the high limit thermostat will cut off the current.
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