{"product_id":"oem-goodman-150-f-primary-limit-switch-for-amh81155cnaa-b1370198","title":"OEM Goodman 150°F Primary Limit Switch for AMH81155CNAA — B1370198","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370198\u003c\/strong\u003e is a genuine OEM 150°F primary (high) limit switch for the Goodman\/Amana \u003cstrong\u003eAMH81155CNAA\u003c\/strong\u003e gas furnace and compatible models. Mounted through the heat exchanger deck in the supply-air stream, this normally-closed switch monitors plenum temperature and shuts off the burners if the furnace overheats — the primary overheat protection on the appliance.\u003c\/p\u003e\u003cp\u003eA common symptom of a failing primary limit is short-cycling on heat: the burners light, the temperature climbs too fast (often from restricted airflow), and the limit opens to stop the burners while the blower keeps running. A switch that has failed open will prevent the furnace from heating at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 150°F (primary\/high-limit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e normally-closed disc\/insert thermal limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e primary overheat protection for the heat exchanger deck\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Goodman\/Amana AMH81155CNAA and compatible furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e B1370198\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e The primary limit's trip temperature and insert length are matched to the furnace's specific heat exchanger and airflow. Installing a generic limit with the wrong rating or probe length leads to nuisance trips or inadequate protection. This genuine Goodman B1370198 is factory-calibrated to 150°F with the correct mounting footprint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstall difficulty:\u003c\/strong\u003e Moderate. Turn off power, remove the burner-compartment or deck panel, unscrew the switch, transfer the wiring, and seat the new switch in the same opening. Because short-cycling is usually caused by airflow restriction, inspect the filter, blower, and ductwork before returning the furnace to service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057642488179,"sku":"GOODMAN-6003","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-amh81155cnaa-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}