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The Goodman B1370176 Pressure Switch is a genuine OEM draft-proving control for the ADS80703AXA furnace and compatible Goodman and Amana models. This normally-open switch verifies that the inducer motor has established proper venting draft before the control board allows ignition — a key safety interlock that prevents the furnace from firing without adequate flue airflow.
The OEM Goodman switch is matched to the exact -0.47" W.C. setpoint your furnace requires, preventing nuisance lockouts and false trips. A generic equivalent with the same pressure rating and port is available at a lower price, but precise calibration and hose-port fit make OEM the safer bet for pressure-sensitive applications.
Difficulty: Easy (2/5). Power down the furnace, note the tubing orientation, transfer the silicone hose and wiring, and mount with the supplied screws. Replacement typically takes 10–20 minutes. Verify the switch closes on a cold start cycle before returning to service.