Lochinvar & A.O. Smith 100093811 Door Switch 319847-401 This 130-195F auto limit switch

This 130-195F auto limit switch serves as a vital safety component

Always verify the unit's serial number

When swapping a burner assembly or heat exchanger

multi-horsepower PSC blower motor specifically engineered for flexibility in air handler and furnace applications

Lochinvar & A.O. Smith 100093811 Door Switch 319847-401 This 130-195F auto limit switchWhen you're troubleshooting a natural gas water heater that won't ignite or is throwing intermittent error codes, the Lochinvar & A. O. Smith 100093811 Door Switch is a critical safety component to inspect. Designed specifically for the NAT FG40T40 series, this OEM replacement door switch serves as a definitive safety interlock, ensuring the burner assembly is correctly isolated and the access door is fully secured before allowing the ignition