This genuine Trane part ensures factory-spec compatibility

Common indicators include ignition failure lockout codes

it meets UL 1585 and CSA C22

or the unit failing to shift into defrost mode

Lochinvar & A.O. Smith 100109316 Burner Assembly 321702-401 This genuine Trane part ensuresWhen you're out in the field servicing high recovery natural gas units, having the correct Lochinvar and A. O. Smith OEM replacement parts is critical for restoring system integrity. The 100109316 Burner Assembly is a high performance FVIR burner assembly utilizing a #33 orifice specifically designed for Natural Gas (NG) applications. This 100109316 gas water heater burner is engineered to meet Flammable Vapor Ignition Resistant (FVIR) standards,