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The Goodman 20165703S Hot Surface Ignitor (HSI) is the genuine OEM ignition source for the GMV80905CXA gas furnace. On each heat call the control board energizes this ignitor until it glows red-hot, lighting the burners without a standing pilot. A weak or cracked ignitor is one of the most common causes of no-heat and ignition-lockout faults, making this an essential wear-and-tear replacement part.
This factory OEM ignitor matches the resistance, glow temperature, and mounting bracket the GMV80905CXA's control board expects. Generic universal ignitors may draw the wrong current, seat poorly against the burner, or crack prematurely from thermal shock. For dependable cold-weather starts, the genuine OEM part is the safe choice.
Easy (2/5) — Usually one or two mounting screws and a plug-in wire harness. Disconnect power first, and never touch the ceramic/silicon element with bare fingers — skin oils can cause hot spots and early failure. Handle only by the bracket or connector.