Lower Thermistor Replacement Kit for Rheem Performance Platinum Water HeatersThe Rheem PROTECH Lower Thermistor Replacement Kit contains everything that you need to replace the Lower Thermistor Assembly on your Rheem Super Sentinel water heater. This kit repairs Super Sentinel water heaters that may have faulty Lower Thermistor assembly. Kit ensures safe and reliable operation. California residents see Prop 65 WARNINGS Kit includes: lower thermistor For use on Rheem Performance Platinum water heaters equipped with the Plus One