{"product_id":"oem-goodman-300f-primary-limit-switch-for-gmth070-4a-b1370195","title":"OEM Goodman 300F Primary Limit Switch for GMTH070-4A — B1370195","description":"\u003ch2\u003eGoodman B1370195 Primary Limit Switch (300°F)\u003c\/h2\u003e\u003cp\u003eThe B1370195 is the genuine OEM primary high-limit switch for the Goodman GMTH070-4A gas furnace and compatible Goodman\/Amana equipment. Positioned on the heat-exchanger bulkhead, this 300°F auto-reset control is the main over-temperature safety: if supply-air temperature climbs too high — typically from low airflow, a dirty filter, or a blower fault — it opens the circuit to shut down the burners and protect the heat exchanger. A failed or drifting primary limit is a frequent source of furnace lockouts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 300°F\u003c\/li\u003e\n\u003cli\u003eType: Primary auto-reset high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: Heat-exchanger over-temperature safety\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMTH070-4A and compatible furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eFactory OEM ensures the exact 300°F trip point and the correct insertion depth into the airstream. Aftermarket limits can trip early or late, causing short-cycling or, worse, failing to protect the heat exchanger. For a primary safety control, OEM is the right call.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Two screws and two spade terminals. Kill power first; replacement takes roughly 10–15 minutes.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058166120819,"sku":"GOODMAN-12547","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-300f-primary-limit-switch-for-gmth070-4a-b1370195","provider":"National HVAC Parts","version":"1.0","type":"link"}