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The Goodman 20197310 is a genuine OEM air-proving pressure switch calibrated at -.60 inches water column with a normally open (NO) contact set, designed for the Amana/Goodman AMH950904CXAC and compatible high-efficiency gas furnaces. This safety switch verifies that the inducer draft motor is moving combustion air before the ignition sequence begins. If venting is blocked, the condensate trap is clogged, or the inducer is weak, the switch stays open and the furnace safely locks out.
The OEM switch guarantees the exact -.60" trip point and factory hose-port fit — critical, since an incorrect set point causes false lockouts or unsafe firing. The generic equivalent matches the same rating and terminals at a lower price for standard repairs. Verify the set point stamped on the switch matches -.60" before installing.
Moderate (2/5). Roughly 15–25 minutes: cut power, note the hose and wire positions, swap the switch, and reconnect. Confirm the tubing is free of condensate. Test a full ignition cycle after installation.