{"product_id":"oem-goodman-0-40in-no-pressure-switch-for-gmph050-3-b1370126","title":"OEM Goodman -0.40in NO Pressure Switch for GMPH050-3 — B1370126","description":"\u003ch2\u003eGoodman B1370126 Pressure Switch (-0.40\" NO)\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370126\u003c\/strong\u003e is a genuine OEM draft\/air-proving pressure switch for the \u003cstrong\u003eGMPH050-3\u003c\/strong\u003e gas furnace. This normally-open switch monitors the negative pressure created by the inducer\/draft motor and must close before the ignition sequence begins — proving that combustion gases are venting properly. A faulty switch causes lockouts, no ignition, or short-cycling. The genuine part restores reliable, safe startup.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1370126\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetpoint:\u003c\/strong\u003e -0.40 in. w.c.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Normally Open (NO), closes on negative pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Single-pole draft \/ air-proving switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Single hose port, spade terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMPH050-3 gas furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e switch is calibrated to the exact -0.40\" trip point required by the GMPH050-3 venting design. Generic switches with a different setpoint can allow unsafe ignition or cause nuisance lockouts. For an air-proving safety control, matching the factory pressure rating is essential.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — Typically 15–20 minutes. Disconnect power, remove the mounting screw, transfer the hose and spade wires, and reinstall. A nut driver is the only tool needed.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNever bypass a pressure switch. Disconnect power and gas before servicing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058140529011,"sku":"GOODMAN-12019","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-0-40in-no-pressure-switch-for-gmph050-3-b1370126","provider":"National HVAC Parts","version":"1.0","type":"link"}