This part is a standard component in many official Nordyne LP conversion kits

a "flash code 4" on the diagnostic LED

it may fit other units requiring a 240F L-series limit

or carbon buildup in the venting system which prevents the pressure switch from closing

while oversizing can cause excessive noise and static pressure issues within the cabinet

Lochinvar & A.O. Smith 100112667 Burner Assembly L99H008 This part is a standardThe Lochinvar 100112667 is a critical component for maintaining combustion efficiency in high output commercial water heating systems. This 18 inch NAT 18 inch burner assembly is precision engineered with a #30 orifice burner to ensure optimal flow rates and flame stability within the combustion chamber. As a direct A. O. Smith burner assembly replacement, it addresses common performance drops caused by port occlusion or thermal fatigue on older