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The Goodman 0130F00010S is a genuine flame sensor rod for GMTH090-5A gas furnaces. This flame-rectification probe sits in the burner flame and generates a small microamp current that tells the control board a flame is present. When the sensor becomes coated with oxide or fails, the board can't prove flame and shuts the gas valve within seconds — the classic symptom being a furnace that lights, runs a few seconds, then shuts off and repeats (short-cycling).
OEM vs. Generic: The genuine Goodman 0130F00010S uses the correct rod length, bend, and insulator rating to sit precisely in the flame and deliver a strong, stable microamp signal. Generic sensors often have slightly different geometry that reduces flame current and causes intermittent lockouts. For a reliable ignition sequence, OEM is the safe bet.
Install difficulty: Easy (1/5). Cut power, unplug the single sensor wire, remove the mounting screw, and swap in the new rod in the same position. While you're in there, a light polish of the sensor and a clean burner assembly help ensure a strong flame signal. Restore power and confirm the furnace completes a full heating cycle.