{"product_id":"oem-goodman-85in-no-pressure-switch-for-gmpn100-4-b1370150","title":"OEM Goodman .85in NO Pressure Switch for GMPN100-4 — B1370150","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370150 Pressure Switch\u003c\/strong\u003e is a genuine OEM safety control rated at \u003cstrong\u003e-0.85\" WC, normally open (NO)\u003c\/strong\u003e, built for \u003cstrong\u003eGMPN100-4\u003c\/strong\u003e gas furnaces. This switch confirms that the inducer\/draft motor is pulling adequate vent airflow before allowing the ignition sequence to proceed — a critical safety interlock that prevents the furnace from firing without proper venting. A failed switch is a leading cause of furnaces that lock out, short cycle, or won't ignite.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1370150\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet Point:\u003c\/strong\u003e -0.85\" WC (water column)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Normally Open (NO), closes on draft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Model:\u003c\/strong\u003e GMPN100-4 Furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Draft \/ vent safety proving\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe trip point on this switch is a life-safety setting — generic switches with loose or mismatched calibration can either nuisance-trip or, worse, allow firing under poor-draft conditions. The \u003cstrong\u003egenuine Goodman B1370150\u003c\/strong\u003e is factory-calibrated to the exact -0.85\" WC set point and NO configuration your furnace's control logic expects.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate (2\/5).\u003c\/strong\u003e Power down the furnace, disconnect the two spade terminals and the rubber pressure hose, unscrew the switch, and mount the replacement — reconnecting the hose without kinks. Verify ignition and draft proving on startup. Professional installation recommended for combustion safety controls.\u003c\/p\u003e\u003cp\u003eKeep your GMPN100-4 igniting safely and reliably with a genuine OEM pressure switch. In stock and ships fast.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058149736819,"sku":"GOODMAN-12094","price":25.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-85in-no-pressure-switch-for-gmpn100-4-b1370150","provider":"National HVAC Parts","version":"1.0","type":"link"}