{"product_id":"oem-goodman-250-f-primary-limit-switch-for-dds81155cxa-b1370194","title":"OEM Goodman 250°F Primary Limit Switch for DDS81155CXA — B1370194","description":"\u003cp\u003eThe genuine Goodman \u003cstrong\u003eB1370194\u003c\/strong\u003e is a 250°F primary high-limit switch engineered for the Goodman \u003cstrong\u003eDDS81155CXA\u003c\/strong\u003e gas furnace and compatible Goodman and Amana models. Mounted on the heat exchanger or burner bulkhead, this auto-reset switch is the furnace's main overheat safety. If supply-air temperature exceeds 250°F — usually from restricted airflow, a dirty filter, or a failing blower — it opens the gas valve circuit to protect the heat exchanger from cracking and prevent a fire hazard.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 250°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary auto-reset high-limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Normally closed, opens on overtemperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Direct OEM replacement for DDS81155CXA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman \/ Amana genuine OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine Goodman B1370194 is calibrated to open at exactly 250°F, matching the DDS81155CXA control design and the heat exchanger's safe operating window. A generic high-limit with the wrong temperature rating either nuisance-trips (no heat) or fails to protect the exchanger (safety risk). OEM units also match the mounting depth and bracket, so probe insertion into the airstream is correct. For your furnace's most important safety device, use the genuine part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Moderate (3\/5)\u003c\/h3\u003e\u003cp\u003eTurn off power and gas, remove the two mounting screws, and carefully withdraw the sensing element from the airstream. Transfer the wire connectors, install the new switch to the same depth and orientation, and reassemble. If the old limit tripped, correct the airflow restriction first — a repeatedly tripping high-limit indicates a serious problem.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058012733811,"sku":"GOODMAN-9459","price":59.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-250-f-primary-limit-switch-for-dds81155cxa-b1370194","provider":"National HVAC Parts","version":"1.0","type":"link"}