Compatibility depends on the model and serial number of your unit

this factory-authorized kit maintains the original equipment’s pressure drop characteristics and safety standards

What is the direction of rotation for this part

causing the heat exchanger to reach the J11R00306-003 trip point

Lochinvar & A.O. Smith 100263932 Thermistor 319847-401 Compatibility depends on the modelWhen you're dealing with inconsistent water temps or persistent E5 error codes on a high efficiency unit, the Lochinvar & A. O. Smith 100263932 Thermistor is the OEM replacement part you need to restore precise temperature regulation. This Negative Temperature Coefficient (NTC) sensor is the general lower thermistor, designed to monitor the bottom of the tank and provide the control board with the real time data required for accurate burn modulation