{"product_id":"oem-goodman-m4-primary-limit-switch-for-gch90703bxab-20162906","title":"OEM Goodman M4 Primary Limit Switch for GCH90703BXAB — 20162906","description":"\u003ch2\u003eGenuine Goodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe OEM Goodman 20162906 M4 primary limit switch is a factory safety control for the \u003cstrong\u003eGoodman GCH90703BXAB\u003c\/strong\u003e gas furnace. This normally-closed thermal switch monitors heat-exchanger temperature and opens the circuit to shut off the burners if the furnace overheats — protecting the unit and your home from unsafe conditions. A tripped or failed limit switch is a common cause of short-cycling, no-heat calls, and blower lockouts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003ePart Type: Primary High-Limit Switch (M4)\u003c\/li\u003e\n\u003cli\u003eFunction: Normally-closed thermal safety cutout\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003cli\u003eFits: GCH90703BXAB gas furnace\u003c\/li\u003e\n\u003cli\u003eEquipment Type: Furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003egenuine Goodman OEM limit switch\u003c\/strong\u003e is calibrated to the exact trip temperature specified for your furnace's heat exchanger. Because a limit switch is a safety-critical component, matching the factory temperature rating is essential — a mis-rated generic switch can either nuisance-trip or fail to protect the unit. Choose OEM for correct calibration and peace of mind.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5).\u003c\/strong\u003e Replacement requires removing two mounting screws and transferring the wire terminals. Cut power at the disconnect before servicing. Verify the switch temperature rating matches the original.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057143333235,"sku":"GOODMAN-20162906","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-gch90703bxab-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}