{"product_id":"oem-goodman-primary-limit-switch-for-gmh950904cxab-20162904","title":"OEM Goodman Primary Limit Switch for GMH950904CXAB — 20162904","description":"\u003ch2\u003eGoodman 20162904 Primary Limit Temperature Control\u003c\/h2\u003e\u003cp\u003eThe Goodman 20162904 is a genuine OEM primary high-limit temperature control for the GMH950904CXAB gas furnace and compatible Goodman\/Amana models. This safety switch monitors heat-exchanger and plenum temperature; if airflow is restricted (dirty filter, failed blower, closed dampers) and temperature exceeds the factory trip point, the limit opens and shuts off the gas valve to prevent overheating and heat-exchanger damage. It automatically resets once the furnace cools.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 20162904\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Primary high-limit \/ overheat protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic (temperature-actuated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Limit Switch \/ Safety Control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Fit:\u003c\/strong\u003e GMH950904CXAB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine Goodman limit is calibrated to the exact trip and reset temperatures this furnace design requires, and its mounting flange and probe length match the factory opening. Generic limits with the wrong set point can nuisance-trip (short cycling) or, worse, fail to open when needed. For a life-safety control, OEM calibration matters.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy–Moderate (2\/5).\u003c\/strong\u003e Shut off power and gas, remove two mounting screws, disconnect the two wire leads, and swap in the new limit. Restore power and confirm the furnace completes a full heat cycle without tripping. Roughly 20–30 minutes.\u003c\/p\u003e\u003cp\u003eDe-energize the furnace before servicing. If the limit trips repeatedly after replacement, investigate airflow — do not bypass the switch.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058117525875,"sku":"GOODMAN-11312","price":44.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-gmh950904cxab-20162904","provider":"National HVAC Parts","version":"1.0","type":"link"}