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The Goodman B1370724 is a genuine OEM ignition control module for the GUE040-3 gas furnace. This board is the brain of the ignition sequence — it controls the igniter, opens the gas valve, monitors flame sensing, and enforces safety lockouts. Symptoms of a failed module include no ignition, short cycling, an igniter that glows but no gas flow, or a furnace that locks out after several tries.
An ignition control module is a safety-critical component, so the genuine OEM Goodman part is strongly recommended. It carries the exact timing, flame-rectification thresholds, and connector pinout your furnace's wiring harness expects. Generic substitutes may require adapter harnesses and can trip nuisance lockouts or fail safety certification. Match the board exactly for reliable, code-compliant operation.
Moderate to Advanced — Involves labeling and transferring multiple low- and line-voltage connectors and verifying flame-sense microamps after install. Best performed by a licensed HVAC technician. Always shut off gas and electrical power before servicing.