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The Goodman B1809913S Circuit Board with 9-Pin Harness is the genuine OEM integrated furnace control (IFC) that manages ignition sequencing, blower timing, safety limits, and diagnostic fault codes on the Goodman GMT140-5D and compatible furnaces. Supplied with the matched 9-pin wiring harness, it replaces boards that fail to light, lock out, or throw error codes. This is the brain of the furnace — a proper OEM replacement restores full, reliable operation.
The OEM board is factory-flashed with the correct timings and pinout for your furnace and ships with the exact harness — no adapters, no guesswork. Aftermarket 'universal' boards require rewiring and may not replicate Goodman's safety and diagnostic logic, risking nuisance lockouts or improper firing.
Moderate (3/5). 30–45 minutes. Photograph existing connections, transfer wires one at a time to the new board, and match the 9-pin harness. Disconnect power at the breaker before starting; professional installation recommended if unsure.