If your water heater has stopped heating, a tripped thermal switch may be to blame. In water heaters and many other types of home appliances, thermal switches disrupt power to the appliance's heating mechanisms when the appliance starts to overheat. Most thermal switches are triggered when the temperature of the water in the tank rises above 170 degrees Fahrenheit. While resetting the thermal switch on your water heater will allow it to operate again, the thermal switch may continue to trip if the underlying problem is not solved. Mfg #239-43676-03 290° Red Resettable Thermal Switch M-I-30T6FBN M-I-303T6FBN2 MI40T6FBN2 M-I-404T6FBN 50T65F
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