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The Goodman B1370724 is a genuine OEM ignition control module (circuit board) built for the GUN125-5B gas furnace and compatible Goodman/Amana models. This board is the brain of the ignition sequence — it manages the inducer, monitors the pressure and limit safety circuits, energizes the igniter, opens the gas valve, and proves flame via the sensor. When a furnace won't light, short-cycles, or locks out, a failed ignition module is a common cause.
The OEM Goodman B1370724 guarantees correct firmware timing, connector pinout, and safety-circuit logic matched to your furnace. Universal or salvaged boards can introduce ignition timing errors and intermittent faults that are difficult to diagnose. For reliable, code-compliant operation, we recommend the genuine OEM module.
Moderate (3/5). Requires disconnecting and reconnecting multiple labeled harness plugs in the correct positions. Photograph wiring before removal, cut all power at the breaker, and verify grounding. Professional installation is recommended if you are not comfortable with furnace wiring.