{"product_id":"oem-goodman-170-f-primary-limit-switch-for-dms80704bna-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for DMS80704BNA — B1370188","description":"\u003ch2\u003eGoodman B1370188 Primary Limit Switch (170°F)\u003c\/h2\u003e\u003cp\u003eThe B1370188 is a genuine OEM Goodman primary high-limit switch engineered for the \u003cstrong\u003eDMS80704BNA\u003c\/strong\u003e 80% AFUE gas furnace and compatible Goodman\/Amana models. This normally-closed thermal safety control opens the heating circuit if the heat exchanger area exceeds its 170°F trip point, protecting your furnace from overheating and preventing dangerous conditions. If your furnace short-cycles, trips on limit, or fails to fire, a worn or drifted limit switch is a common culprit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 170°F (auto-reset)\u003c\/li\u003e\n\u003cli\u003eFunction: Primary high-limit \/ overheat safety\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally closed (opens on rise)\u003c\/li\u003e\n\u003cli\u003eMount: Snap-disc, factory bracket fit\u003c\/li\u003e\n\u003cli\u003eFits: Goodman DMS80704BNA and compatible furnaces\u003c\/li\u003e\n\u003cli\u003ePart number: B1370188\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOur genuine Goodman OEM switch is calibrated to the exact factory trip temperature, ensuring correct cycling and full safety compliance. Aftermarket generics often have wider temperature tolerances that can cause nuisance trips or delayed shut-off. For a safety-critical control, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e A two-wire, single-fastener swap for most DIYers — typically 10–15 minutes. Always shut off power and gas at the furnace before servicing. If you are unsure why the original limit tripped, have a licensed HVAC technician inspect the heat exchanger and blower before replacing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058035671411,"sku":"GOODMAN-9590","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-dms80704bna-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}