{"product_id":"oem-goodman-200-f-primary-limit-switch-for-amh80905cnab-b1370189","title":"OEM Goodman 200°F Primary Limit Switch for AMH80905CNAB — B1370189","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370189 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control for the \u003cstrong\u003eAMH80905CNAB\u003c\/strong\u003e gas furnace. Positioned over the heat exchanger, the primary limit is the furnace's main overheat protection: it opens the gas-valve circuit whenever supply-air temperature climbs past the safe threshold — usually caused by a dirty filter, closed dampers, or a failing blower — and closes again once temperatures return to normal.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 200°F (open on rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset type:\u003c\/strong\u003e Automatic reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Primary heat-exchanger high-limit safety\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Limit bracket on heat-exchanger panel, spade terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e B1370189\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman\/Amana AMH80905CNAB and compatible 80% furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOur \u003cstrong\u003eOEM Goodman B1370189\u003c\/strong\u003e arrives calibrated to the certified 200°F trip point with the correct probe length and bracket for the AMH80905CNAB. Universal aftermarket limits may use a different setpoint or probe depth, which can cause short-cycling on the gas valve or, if rated too high, allow the heat exchanger to overheat. For the furnace's primary safety, OEM is the right choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Kill power, remove the two spade terminals and the mounting screws, and drop in the new limit at the same depth. About 15 minutes. Frequent tripping almost always points to an airflow problem — replace the filter and confirm blower operation before returning the unit to service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057635639667,"sku":"GOODMAN-5862","price":21.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-200-f-primary-limit-switch-for-amh80905cnab-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}