{"product_id":"oem-goodman-m4-primary-high-limit-switch-for-acec961005cnab-20162907","title":"OEM Goodman M4 Primary High-Limit Switch for ACEC961005CNAB — 20162906","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162906 M4 Primary High-Limit Switch\u003c\/strong\u003e is a genuine OEM auto-reset safety control for the \u003cstrong\u003eACEC961005CNAB\u003c\/strong\u003e gas furnace. Mounted on the heat-exchanger \/ supply-air section, it continuously monitors temperature and shuts off the burners if the furnace overheats — protecting the heat exchanger and the home. A failed limit switch is a common cause of short cycling or a furnace that won't fire.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart type: Primary high-limit switch (M4 series)\u003c\/li\u003e\n\u003cli\u003eFunction: Temperature-actuated, automatic reset\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally closed, opens on rise\u003c\/li\u003e\n\u003cli\u003eMount: OEM bracket \/ disc style\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman OEM\u003c\/li\u003e\n\u003cli\u003eOEM part number: 20162906\u003c\/li\u003e\n\u003cli\u003eCompatible model: ACEC961005CNAB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM 20162906 is calibrated to the exact open\/close temperature set point Goodman specifies for this cabinet and airflow design. Generic limit switches with the wrong trip temperature can either nuisance-trip or fail to protect the heat exchanger. For a safety control, the genuine OEM part is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRating: Easy–Moderate (2\/5).\u003c\/strong\u003e Disconnect power, remove the two mounting screws, transfer the spade connectors to the new switch, and re-seat it in the original location. Confirm correct orientation against the heat-exchanger surface. Takes about 10–15 minutes for a confident DIYer; consult a technician if unsure.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057123606899,"sku":"GOODMAN-20162906","price":14.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-high-limit-switch-for-acec961005cnab-20162907","provider":"National HVAC Parts","version":"1.0","type":"link"}