{"product_id":"oem-goodman-170-f-primary-limit-switch-for-gmnt100-4-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for GMNT100-4 — B1370188","description":"\u003ch2\u003eGoodman B1370188 Primary Limit Switch — 170°F\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1370188\u003c\/strong\u003e is a genuine OEM 170°F primary high-limit switch for the Goodman \u003cstrong\u003eGMNT100-4\u003c\/strong\u003e gas furnace. Mounted on the heat exchanger deck, the primary limit monitors supply-air temperature and shuts off the gas valve if the furnace overheats — most often due to restricted airflow from a clogged filter, closed registers, or a weak blower. It is one of the furnace's core safety controls.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 170°F\u003c\/li\u003e\n\u003cli\u003eFunction: Primary high-limit safety control\u003c\/li\u003e\n\u003cli\u003eType: Automatic reset (snap-disc)\u003c\/li\u003e\n\u003cli\u003eCompatible model: Goodman GMNT100-4\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370188\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eBecause the primary limit is a safety-critical control, the \u003cstrong\u003egenuine OEM B1370188\u003c\/strong\u003e is recommended for its exact 170°F calibration and correct disc size\/mounting. Generic snap-disc limits must match trip temperature, mounting hole pattern, and terminal orientation exactly — do not substitute a different temperature rating.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eDisconnect furnace power, pull the two wire terminals, remove the two mounting screws, and install the new limit in the same orientation on the heat exchanger deck. If the limit has been tripping, replace a dirty filter and confirm proper airflow before returning the unit to service.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFits Goodman GMNT100-4. In stock and ready to ship.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058130960755,"sku":"GOODMAN-11724","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-gmnt100-4-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}