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The Goodman 20197308 Pressure Switch is a genuine OEM -0.10 in. WC, normally open (NO) air-proving switch for the AMVC951155DXBA modulating variable-speed furnace and compatible Goodman/Amana models. It confirms that the inducer/draft blower is establishing correct negative pressure and that the vent and condensate paths are clear before the control board permits ignition. If the switch fails to close, the furnace safely locks out ignition — this switch is core to safe combustion venting.
Pressure switches are calibrated to a precise trip point — the OEM Goodman -0.10" switch guarantees the exact set point your control board expects. A generic switch with even a slightly different rating causes nuisance lockouts or, dangerously, may prove draft when venting is actually blocked. Always match the set point stamped on the original; the OEM part removes any guesswork.
Roughly 15 minutes: cut power, note and disconnect the two spade terminals and the rubber sensing tube, unscrew the switch, and mount the replacement. Inspect the sensing tube for cracks or condensate and confirm a clean start-up cycle after installation.