Lochinvar & A.O. Smith 100135312 Burner Refrigerant Proper installation requires ensuring the

Proper installation requires ensuring the metal terminals are fully seated to maintain the dielectric properties required for long-term system stability

the M333A00 will fail-in-place

the upper thermostat has likely failed to energize the first element or its high-limit reset has tripped due to an overheat condition

This is a Lead-Edge CCW rotation blade

Lochinvar & A.O. Smith 100135312 Burner Refrigerant Proper installation requires ensuring theThe Lochinvar & A. O. Smith 100135312 Burner is a critical OEM replacement part designed for high efficiency combustion in commercial heating applications. This main burner assembly, which is technically identical to the Lochinvar BNR3430, features an integrated pressure tap to allow for precise manifold pressure adjustments and diagnostic testing. It is engineered specifically for use in Copper Fin II series equipment, including model CP 991 to 2071