Lochinvar & A.O. Smith 100093811 Door Switch 326058-758 Optimized Flow Dynamics: The damping

Optimized Flow Dynamics: The damping piston design reduces noise and vibration in high-pulsation hot gas line environments

Rugged Construction: Features a resilient 48-frame design and ball bearing assembly for quiet

Heavy-duty T-bracket design prevents flexing during high-cycle operations

Always cross-reference the specific part number on your existing board's logic chip to ensure pin-out alignment

Lochinvar & A.O. Smith 100093811 Door Switch 326058-758 Optimized Flow Dynamics: The dampingWhen 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