or the burners shutting down immediately after a brief flame light-off

this kit provides a cost-effective alternative to full valve replacement

it is designed to withstand higher internal temperatures in demanding hydronic heating and cooling environments

Precise Thermal Calibration: Factory-set for a 110-170F temperature range to ensure tight adherence to system safety parameters

which includes brands like Heil

Lennox 79L57 Orifice 319848-301 or the burners shutting downThe Lennox 79L57 is a critical Natural Gas Burner Orifice engineered specifically for high efficiency Lennox gas furnaces and heating units. This genuine OEM replacement part is precision machined to deliver an exact BTU output by regulating the volumetric flow of natural gas to the burner assembly. Using a Lennox 79L57 Orifice ensures your manifold pressure aligns with factory specifications, preventing issues like incomplete combustion, soot