the 51W15 furnace door switch prevents accidental exposure to high-voltage components and moving parts during routine filter changes or diagnostic testing

Featuring a solid-core current switch with a 1

while the Rotalock side provides a threaded mechanical connection

When should a technician replace the casting instead of just the head mechanism

As a veteran-grade OEM Lennox replacement part

Lochinvar & A.O. Smith 100110060 Heating Element 340155-7024 the 51W15 furnace door switchThe Lochinvar & A. O. Smith 100110060 Heating Element is a heavy duty, 240V 4000W Sandhog replacement designed for demanding residential and light commercial water heating applications. Built with high grade Incoloy nickel alloy sheathing, this low watt density heating element is engineered to resist sediment build up and withstand "dry fire" conditions better than standard copper alternatives. The 10. 7 inch screw in element features a 1 inch NPSM