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The B1370724 is a genuine OEM ignition control module for the Goodman GDE120-5 gas furnace. This board is the brain of the ignition sequence — it powers the igniter, opens the gas valve, monitors the flame-sense signal, and locks out on fault to keep the system safe. Symptoms of a failed module include no ignition, short-cycling, a furnace that runs then shuts off, or repeated lockouts after a few seconds of flame.
Control modules are firmware- and timing-specific to the furnace they were designed for. The genuine Goodman board carries the correct ignition trial, flame-sense sensitivity, and lockout logic for the GDE120-5. Substitute or "universal" boards can cause nuisance faults or unsafe timing. For a safety-critical component like this, OEM is strongly recommended.
Power must be shut off at the breaker before starting. The job involves photographing and transferring the wiring harness plug-by-plug to the new module and confirming the ground and flame-sense leads. Roughly 30–45 minutes for an experienced installer. Because it controls the gas valve, we recommend a licensed HVAC technician if you are unsure about the wiring.