{"product_id":"oem-goodman-blower-door-safety-switch-for-gus100-4-b1370819","title":"OEM Goodman Blower Door Safety Switch for GUS100-4 — B1370819","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370819 Door Switch\u003c\/strong\u003e is the genuine OEM blower-compartment safety interlock for the \u003cstrong\u003eGUS100-4\u003c\/strong\u003e gas furnace. This plunger switch cuts all power to the furnace whenever the blower access panel is removed, protecting the technician from live 115V and spinning blades. When it fails or its plunger sticks open, the furnace stays completely dead even with the panel closed — a frequent cause of a no-power, no-response furnace.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1370819\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Blower door interlock (plunger) switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GUS100-4 gas furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Breaks line power when access panel is open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRating:\u003c\/strong\u003e 115V line-voltage SPST\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis genuine Goodman switch matches the original's plunger travel, mounting hole pattern, and terminal layout, so the panel presses it fully closed with no shimming or bending of the bracket. Generic interlock switches vary in plunger length and may not make contact when the door is seated — leaving the furnace dead. OEM ensures reliable, code-correct operation.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Cut power, remove the blower panel, unclip or unscrew the old switch, transfer the two wires, and snap in the replacement. About 15–20 minutes with a screwdriver and nut driver.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058199019891,"sku":"GOODMAN-13348","price":22.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-blower-door-safety-switch-for-gus100-4-b1370819","provider":"National HVAC Parts","version":"1.0","type":"link"}