{"product_id":"oem-goodman-stack-overtemp-limit-switch-gun075-3-b1370109","title":"OEM Goodman Stack Overtemp Limit Switch GUN075-3 — B1370109","description":"\u003ch2\u003eGoodman B1370109 Stack Overtemp Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370109\u003c\/strong\u003e is a genuine OEM stack overtemperature limit switch for the Goodman \u003cstrong\u003eGUN075-3\u003c\/strong\u003e furnace. It monitors flue\/stack temperature and opens the control circuit if the furnace runs too hot — a safety response to restricted airflow, a dirty filter, a failed blower, or a blocked vent. Correct overtemp protection prevents heat-exchanger damage and hazardous operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Stack \/ high-limit overtemperature switch\u003c\/li\u003e\n\u003cli\u003eFunction: Opens circuit on flue overheat condition\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370109\u003c\/li\u003e\n\u003cli\u003eCompatible model: Goodman GUN075-3 furnace\u003c\/li\u003e\n\u003cli\u003eMounting: Direct OEM bracket fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM B1370109\u003c\/strong\u003e is set to the precise trip temperature and mounting location engineered for the GUN075-3. Generic high-limits with different set points can cause short-cycling or fail to protect the heat exchanger. OEM ensures the switch trips exactly when the factory intended.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — power off, swap the spade connections, and reuse the mounting screws. Plan 10–20 minutes. If the switch was tripping, clear the airflow restriction (filter, blower, ducting) before restarting the furnace.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058188534131,"sku":"GOODMAN-13133","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-stack-overtemp-limit-switch-gun075-3-b1370109","provider":"National HVAC Parts","version":"1.0","type":"link"}