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The Goodman B1370724 is a genuine OEM ignition control module for the Goodman GUI125-5A gas furnace and compatible models. This circuit board is the brain of the ignition sequence — it manages the inducer, igniter warm-up, gas valve timing, flame sensing, and lockout safety. If the furnace clicks but won't light, locks out after several tries, or shows an ignition-fault flash code, a failed control module is a frequent cause.
This genuine Goodman OEM board carries the exact firmware timing and terminal layout your furnace expects. Substitute boards can mis-time the ignition sequence or fail flame-sense calibration, triggering repeat lockouts. For a control component tied directly to gas safety, OEM is strongly recommended.
Advanced (4/5). Multiple connectors and a strict wire-for-wire transfer — photograph the harness before you start. Cut power at the disconnect, move plugs one at a time, and verify the ignition sequence and flame current after startup. Best left to an experienced tech; improper wiring can defeat safety interlocks.