{"product_id":"oem-goodman-door-safety-switch-with-wires-for-gmnt100-4b-b1370820","title":"OEM Goodman Door Safety Switch with Wires for GMNT100-4B — B1370820","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370820 Door Switch with Wires\u003c\/strong\u003e is a genuine OEM blower-compartment safety interlock for the \u003cstrong\u003eGMNT100-4B\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. This plunger-style switch cuts electrical power to the furnace whenever the blower access panel is removed, protecting technicians and homeowners from moving blower components and live wiring during service. It ships as a complete assembly with the \u003cstrong\u003efactory wiring harness pre-attached\u003c\/strong\u003e for a plug-and-play replacement.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFunction: Blower-door safety interlock switch\u003c\/li\u003e\n\u003cli\u003eType: Normally open plunger switch (closes when panel is installed)\u003c\/li\u003e\n\u003cli\u003eIncludes: Pre-wired lead harness\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1370820\u003c\/li\u003e\n\u003cli\u003eCompatibility: GMNT100-4B and select Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003eType: Direct-replacement factory assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eBecause it arrives with the \u003cstrong\u003ecorrect OEM harness and connectors\u003c\/strong\u003e, the genuine B1370820 drops in without splicing or adapting terminals. Generic door switches often require cutting and crimping, and a poorly matched plunger length can leave the furnace dead even with the panel on. The OEM assembly guarantees proper actuation and a clean connection.\u003c\/p\u003e\u003ch3\u003eSymptoms of a Failed Door Switch\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace has no power even though the breaker is on\u003c\/li\u003e\n\u003cli\u003eFurnace only runs when the panel is pushed or held by hand\u003c\/li\u003e\n\u003cli\u003eIntermittent operation as the panel shifts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Difficulty: Easy to Moderate\u003c\/h3\u003e\u003cp\u003eShut off power, remove the old switch bracket, and connect the pre-wired harness to the matching plug. Because it comes wired, most installs take 20–30 minutes. Confirm the plunger depresses fully when the blower panel is reinstalled so the safety circuit closes correctly.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058131157363,"sku":"GOODMAN-11732","price":40.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-door-safety-switch-with-wires-for-gmnt100-4b-b1370820","provider":"National HVAC Parts","version":"1.0","type":"link"}