Lochinvar & A.O. Smith 100093811 Door Switch 340155-7024 Standard service for VP513 and

Standard service for VP513 and VP517 valves requires two spacers per valve

The S1-031-09170-000 is an upgraded Source1 component

or visible "wobble" during the start-up cycle indicates the blade is out of balance or bent and requires immediate replacement to protect the fan motor

if those components show signs of wear

Lochinvar & A.O. Smith 100093811 Door Switch 340155-7024 Standard service for VP513 andWhen 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