{"product_id":"oem-goodman-blower-door-safety-interlock-switch-for-gup120-5a-b1370819","title":"OEM Goodman Blower Door Safety Interlock Switch for GUP120-5A — B1370819","description":"\u003ch2\u003eGoodman B1370819 Blower Door Interlock Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370819\u003c\/strong\u003e is a normally-open blower-door safety interlock switch designed for the \u003cstrong\u003eGUP120-5A\u003c\/strong\u003e gas furnace and other compatible Goodman, Amana, and Janitrol models. This switch is a critical safety device: it interrupts power to the furnace control circuit whenever the blower access panel is removed, preventing the unit from operating with the door open. A failed or stuck interlock is a common cause of a furnace that won't start after service.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Blower-door safety interlock (power cutoff)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAction:\u003c\/strong\u003e Normally open — closes when panel is installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GUP120-5A and cross-referenced Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e B1370819\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis is a genuine Goodman OEM switch built to the factory contact rating and mounting footprint. Aftermarket door switches exist at a lower price, but tolerances on the plunger travel and mounting tabs vary — an out-of-spec generic can fail to close reliably, leaving the furnace dead. For a safety-circuit component we recommend the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Disconnect power, remove the two mounting screws, transfer the wire leads, and reinstall — typically a 10–15 minute job with basic hand tools. Always confirm the switch closes fully with the panel seated.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eVerify fitment by part number B1370819 against your unit's parts list before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058195448179,"sku":"GOODMAN-13250","price":22.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-blower-door-safety-interlock-switch-for-gup120-5a-b1370819","provider":"National HVAC Parts","version":"1.0","type":"link"}