{"product_id":"oem-goodman-door-interlock-switch-w-wires-for-gmt070-4a-b1370820","title":"OEM Goodman Door Interlock Switch w\/ Wires for GMT070-4A — B1370820","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370820 Door Switch\u003c\/strong\u003e is a genuine OEM blower-compartment door interlock safety switch, supplied complete with its factory wire harness, for the \u003cstrong\u003eGoodman GMT070-4A\u003c\/strong\u003e gas furnace. This normally-open switch de-energizes the furnace whenever the blower access panel is removed, preventing the burners and blower from operating with the door off. A failed door switch is a common cause of a furnace that appears completely dead — no ignition, no blower, no board lights.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Blower door interlock (plunger\/lever actuated)\u003c\/li\u003e\n\u003cli\u003eContacts: Normally open — closes when door is installed\u003c\/li\u003e\n\u003cli\u003eIncludes: Pre-terminated wire harness \/ leads\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1370820\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMT070-4A gas furnace\u003c\/li\u003e\n\u003cli\u003eFunction: Safety power cutoff on panel removal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman assembly\u003c\/strong\u003e arrives with the correct plunger length, mounting bracket, and pre-wired leads matched to your furnace's harness connector — no splicing or guesswork. Generic switches often require cutting and crimping to adapt, and an incorrect plunger travel can leave the circuit open even with the door closed. The OEM part is a plug-and-play fit.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate.\u003c\/strong\u003e Cut power at the disconnect, note the wire routing, unplug or splice the leads, unscrew the old switch bracket, and mount the new one. Verify the plunger is fully depressed when the door is seated. Typical install: 20–30 minutes.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058158158195,"sku":"GOODMAN-12337","price":40.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-door-interlock-switch-w-wires-for-gmt070-4a-b1370820","provider":"National HVAC Parts","version":"1.0","type":"link"}