{"product_id":"oem-goodman-300-f-primary-limit-switch-for-gdt045-3b-b1370195","title":"OEM Goodman 300°F Primary Limit Switch for GDT045-3B — B1370195","description":"\u003ch2\u003eGoodman B1370195 Primary Limit Switch (300°F)\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370195\u003c\/strong\u003e is the factory-original primary high-limit switch for the \u003cstrong\u003eGDT045-3B\u003c\/strong\u003e gas furnace. Mounted on the heat-exchanger bulkhead, this normally-closed control continuously monitors supply-plenum temperature and opens the gas-valve circuit if it reaches its 300°F trip point. It's the furnace's principal defense against a cracked heat exchanger, blocked airflow, or a stuck blower — shutting down combustion before dangerous temperatures develop.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e B1370195\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary high-limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 300°F (open on rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact configuration:\u003c\/strong\u003e Normally closed (auto-reset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GDT045-3B furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment:\u003c\/strong\u003e Gas furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eChoose the \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e part for a guaranteed exact trip-point, disc size, and mounting-bracket match — critical for a safety component. The \u003cstrong\u003egeneric\u003c\/strong\u003e alternative delivers the same 300°F rating at a lower cost. Both are guaranteed to fit the GDT045-3B.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy to Moderate\u003c\/h3\u003e\u003cp\u003eAbout a 20-minute repair. Kill power at the breaker, photograph the wiring, remove the two mounting screws and spade connectors, then install the replacement in the same orientation. Because this is a primary safety, confirm proper airflow and combustion after the repair; if the switch tripped without an obvious cause, have a licensed technician inspect the heat exchanger.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058079023475,"sku":"GOODMAN-10406","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-300-f-primary-limit-switch-for-gdt045-3b-b1370195","provider":"National HVAC Parts","version":"1.0","type":"link"}