Industrial-Grade Build: Features a rugged zinc die-cast housing that protects internal components from debris and environmental stress

the 79L55 burner orifice is a vital Lennox furnace replacement part when addressing issues such as poor ignition

The robust circuitry is designed to handle voltage fluctuations and harsh mechanical room environments

High-Output Performance: Delivers approximately 85

Lochinvar & A.O. Smith 100093811 Door Switch 319847-401 Industrial-Grade Build: Features a ruggedWhen 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