{"product_id":"oem-goodman-37-wc-pressure-switch-for-wgfm195045s3bab-20197312","title":"OEM Goodman -.37\" WC Pressure Switch for WGFM195045S3BAB — 20197312","description":"\u003ch2\u003eGoodman 20197312 Pressure Switch (-.37\" WC, Normally Open)\u003c\/h2\u003e\u003cp\u003eThe Goodman 20197312 is a genuine OEM air-proving pressure switch calibrated at \u003cstrong\u003e-0.37 inches of water column (WC)\u003c\/strong\u003e with a \u003cstrong\u003enormally open (NO)\u003c\/strong\u003e contact configuration, built for the \u003cstrong\u003eWGFM195045S3BAB\u003c\/strong\u003e furnace. This switch verifies that the induced-draft blower is generating adequate negative pressure to safely exhaust flue gases before the control board allows ignition. If proper draft isn't proven, the switch keeps the burners locked out — a critical carbon-monoxide safety function.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20197312\u003c\/li\u003e\n\u003cli\u003eTrip Setpoint: -0.37\" WC (water column)\u003c\/li\u003e\n\u003cli\u003eContact Type: Normally Open (NO)\u003c\/li\u003e\n\u003cli\u003eFunction: Draft \/ air-flow proving safety switch\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman WGFM195045S3BAB and related Goodman\/Amana furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePressure switch calibration is model-specific — the -0.37\" WC setpoint must match the furnace's blower and venting design exactly. The OEM 20197312 guarantees the correct trip point, while generic switches with approximate ratings frequently cause nuisance lockouts or, worse, allow ignition without adequate draft. Always match OEM on draft-proving safety components.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate\u003c\/strong\u003e — Power down the furnace, transfer the sensing hose and wiring spade connectors, and remount the switch in the same orientation. Verify the hose is free of condensate. About 20–30 minutes for a competent DIYer.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058234933619,"sku":"GOODMAN-14282","price":32.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-37-wc-pressure-switch-for-wgfm195045s3bab-20197312","provider":"National HVAC Parts","version":"1.0","type":"link"}