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The Goodman 0154F00004 Gasket is a genuine OEM sealing component for the WFM18070S4BXCC furnace and compatible Goodman/Amana models. Furnace gaskets create the airtight seal between mating combustion or blower assembly surfaces, keeping conditioned air, flue gases, and combustion products on their correct paths. A hardened, torn, or missing gasket leads to air leaks, reduced efficiency, whistling noises, and — where it seals a combustion surface — a potential safety concern. Replacing the gasket whenever you open the sealed assembly is best practice.
This gasket is die-cut to the exact bolt pattern and thickness of the Goodman assembly it seals. Universal gasket material can be trimmed to fit, but hand-cut seals rarely match OEM compression characteristics, and an imperfect seal on a combustion joint is not worth the savings. The genuine 0154F00004 drops in with a guaranteed factory seal.
About 20–30 minutes depending on the assembly. Power down, remove the fasteners on the sealed component, peel away the old gasket, clean both mating surfaces of residue, seat the new gasket on the alignment holes, and re-torque evenly. Work carefully so the gasket is not pinched or offset.