Lochinvar & A.O. Smith 100093810 Switch 319848-301 While some VT series models

While some VT series models handle low-pressure steam up to 15 psi

which is critical for preventing coil freeze-up or maintaining ventilation

this ECM motor is dual-rated for 208-230V applications

ensuring efficient moisture removal and energy regulation

maintaining the specific timing requirements for pre-purge and post-purge cycles necessary for heat exchanger longevity and indoor air quality

Lochinvar & A.O. Smith 100093810 Switch 319848-301 While some VT series modelsThe Lochinvar & A. O. Smith 100093810 Switch is a critical safety component designed specifically for natural gas water heaters, including the high volume FG40T34 residential model. As a primary water heater door switch, this part functions as an electrochemical interlock, ensuring the burner assembly only receives fuel when the access door is fully seated and secured. This OEM replacement part is engineered to meet the precise tolerances of Lochinvar