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The Goodman 20197308 is a genuine OEM air-proving pressure switch for the Amana/Goodman AMH950704CXAD gas furnace. Rated at -0.10 in WC and normally open (NO), it verifies that the inducer draft motor is running and the venting is clear before allowing ignition. If the switch fails to close — due to a blocked flue, cracked hose, clogged drain trap, or weak inducer — the furnace safely refuses to fire, preventing dangerous combustion conditions.
Pressure switches are calibrated to a precise set point. The OEM 20197308 guarantees the correct -0.10 in WC trip and hose-port fit for this furnace. A mismatched generic switch can cause chronic no-heat lockouts or bypass a critical draft-proving safety check. Always use OEM for combustion-safety controls.
Moderate (3/5). One or two mounting screws, spade connectors, and a silicone sensing hose. Confirm hose routing and connector orientation match the original. Shut off gas and power first; professional installation recommended.