{"product_id":"oem-goodman-170-f-primary-limit-switch-for-amh80704bnab-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for AMH80704BNAB — B1370188","description":"\u003ch2\u003eGoodman B1370188 Primary Limit Switch (170°F)\u003c\/h2\u003e\u003cp\u003eThe Goodman B1370188 is a genuine OEM primary high-limit switch engineered for the Amana \u003cstrong\u003eAMH80704BNAB\u003c\/strong\u003e 80% AFUE gas furnace and compatible Goodman\/Amana models. This normally-closed thermal safety control opens the gas valve circuit if heat-exchanger temperatures exceed its 170°F trip point, protecting the furnace from overheating caused by restricted airflow, a dirty filter, or a failed blower. If your furnace short-cycles on high limit or the gas valve won't energize, a failed limit switch is a common cause.\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 \/ temperature safety switch\u003c\/li\u003e\n\u003cli\u003eContacts: Normally closed (opens on temperature rise)\u003c\/li\u003e\n\u003cli\u003eMounting: OEM flange-mount to heat exchanger \/ vestibule panel\u003c\/li\u003e\n\u003cli\u003eFits: Amana AMH80704BNAB and compatible Goodman 80% furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine OEM B1370188 is factory-calibrated to the exact 170°F setpoint specified for your furnace, ensuring correct safety timing and preventing nuisance lockouts. Aftermarket generic limit switches may use a nearby setpoint or looser tolerance, which can lead to premature tripping or delayed shutdown. For a safety-critical control, matching the OEM setpoint is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy\u003c\/strong\u003e (2\/5). Shut off power and gas, remove the two mounting screws, transfer the spade wire connectors, and install the replacement in the same orientation. Typical replacement takes 10–15 minutes with basic hand tools. Always de-energize the furnace before servicing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057612898675,"sku":"GOODMAN-5360","price":29.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-amh80704bnab-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}