{"product_id":"oem-goodman-150-f-primary-limit-switch-for-ams81405dna-b1370198","title":"OEM Goodman 150°F Primary Limit Switch for AMS81405DNA — B1370198","description":"\u003ch2\u003eGoodman B1370198 Primary Limit Switch (150°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGoodman B1370198\u003c\/strong\u003e is a genuine OEM primary high-limit switch engineered for the \u003cstrong\u003eAMS81405DNA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana air handlers. This normally-closed thermal safety control monitors heat-exchanger and plenum temperature, opening the burner circuit if the furnace exceeds its 150°F trip point to prevent overheating, cracked heat exchangers, and nuisance shutdowns. If your furnace short-cycles on heat or trips out during long calls, a failed limit switch is a common culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 150°F open on rise, auto-reset on cool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Normally-closed primary high-limit safety switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e AMS81405DNA and select Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Overheat protection for the burner\/blower circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuild:\u003c\/strong\u003e Bimetal snap-disc with factory-calibrated set point\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOur \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e switch ships with the exact factory trip calibration and terminal geometry, so it drops in without rewiring or recalibration. Aftermarket generics may carry looser temperature tolerances that cause premature trips or fail to protect the heat exchanger. For a UL-listed safety component, we recommend genuine OEM.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e A DIY-friendly repair for handy owners: cut power at the breaker, remove two mounting screws, transfer the spade connectors, and reinstall. A multimeter continuity check confirms the diagnosis in minutes. If you are uncomfortable working near gas components, consult a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057722343795,"sku":"GOODMAN-7235","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-ams81405dna-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}