{"product_id":"oem-goodman-door-switch-with-wires-for-gmth090-5b-b1370820","title":"OEM Goodman Door Switch with Wires for GMTH090-5B — B1370820","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370820 Door Switch with Wires\u003c\/strong\u003e is a genuine OEM blower-compartment safety interlock designed for the \u003cstrong\u003eGMTH090-5B\u003c\/strong\u003e gas furnace. This switch cuts power to the blower and control circuit whenever the blower access panel is removed, protecting technicians and homeowners during service. When a furnace won't start with the door on but runs with it pushed in by hand, a failed door switch is the most common cause.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Blower-door safety interlock switch\u003c\/li\u003e\n\u003cli\u003eIncludes: Pre-terminated wire leads for plug-and-play install\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman GMTH090-5B and compatible furnace platforms\u003c\/li\u003e\n\u003cli\u003eFunction: Normally-open plunger switch, closes when door is seated\u003c\/li\u003e\n\u003cli\u003eBrand: Genuine Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine Goodman B1370820 arrives with the correct plunger travel, wire gauge, and factory connector so it seats exactly against the blower panel and closes reliably. Generic universal door switches often require splicing, lack the correct actuation distance, and can cause intermittent no-heat faults. For a safety-critical interlock, we recommend the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1 of 5).\u003c\/strong\u003e Disconnect power, remove the two mounting screws, unplug the leads, and reverse. Typical replacement takes 10–15 minutes with a nut driver. Always confirm 24V control power is restored and the blower runs only when the door is seated.\u003c\/p\u003e\u003cp\u003eBacked by genuine Goodman quality and an exact-fit guarantee for the GMTH090-5B.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058167071091,"sku":"GOODMAN-12585","price":40.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-door-switch-with-wires-for-gmth090-5b-b1370820","provider":"National HVAC Parts","version":"1.0","type":"link"}