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The Goodman 0130F00010S is a genuine OEM flame sensor for the GMT090-3 gas furnace and package unit. This flame-rectification rod confirms to the control board that a flame is present after ignition; a weak or fouled sensor is one of the most common causes of short cycling, lockouts, and intermittent no-heat calls. Installing a clean OEM sensor restores a strong, stable microamp signal so the furnace stays lit through the heating cycle.
The OEM sensor uses the correct rod length, ceramic insulator, and bracket geometry so it sits in the proper position in the flame and produces the expected flame-signal current. Generic sensors may mount at the wrong depth, giving a marginal signal that triggers nuisance lockouts. OEM keeps the flame-proving circuit reliable.
Easy (2/5). Disconnect power, remove the single mounting screw and the wire lead, install the new sensor, and reconnect. Route the wire away from the burner and verify the flame signal on startup. Most handy homeowners can complete this repair.
Shut off power at the disconnect before servicing. If the fault persists, consult a licensed HVAC technician.