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The Goodman 20197308 Pressure Switch is a genuine OEM -.10 in. w.c. normally open (NO) air-proving safety control for the Amana/Goodman AMVC950453BXAB variable-speed condensing furnace. It works alongside the furnace's other draft controls to confirm proper inducer operation and a clear flue before the ignition sequence begins.
This normally open switch closes when the correct negative pressure is sensed. If it fails to close — due to a blocked flue, weak inducer, clogged drain, or a bad switch — the control board halts ignition and reports a fault, resulting in a no-heat condition. Restoring the correct switch keeps the safety chain intact.
OEM vs. Generic: Genuine 20197308 is factory-calibrated to the precise -.10" set point and NO configuration the AMVC95 board expects. Substituting a switch with a different set point or normally closed contacts can cause nuisance lockouts or bypass a safety. For pressure switches, always choose OEM.
Install difficulty: Easy. Disconnect power, move the sensing hose and spade terminals to the new switch, and mount it in the same position. Verify operation with a manometer on the next heat call. Basic hand tools only.