{"product_id":"oem-goodman-m4-primary-limit-switch-for-acvc960403bnba-20162907","title":"OEM Goodman M4 Primary Limit Switch for ACVC960403BNBA — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003e20162906 M4 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control mounted on the heat-exchanger\/blower section of the furnace. It continuously monitors supply-air temperature and opens the circuit to shut down the burners if airflow is restricted and temperatures climb too high — protecting the heat exchanger from damage. This M4-series primary limit is a direct-fit replacement for the Goodman \u003cstrong\u003eACVC960403BNBA\u003c\/strong\u003e furnace.\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\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003cli\u003eEquipment: Gas Furnace\u003c\/li\u003e\n\u003cli\u003ePrimary Fit: ACVC960403BNBA\u003c\/li\u003e\n\u003cli\u003eFunction: Opens on over-temperature to shut off heat\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (temperature-sensing)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e M4 limit is factory-calibrated to the precise trip and reset temperatures for this model. Substituting a switch with a different setpoint risks nuisance lockouts or inadequate over-temperature protection. For a primary safety device, OEM is the right choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5).\u003c\/strong\u003e Involves removing the blower-compartment panel, unplugging the wiring connector, and unscrewing the limit from its mounting. Shut off power and gas before servicing, and correct any airflow restriction (dirty filter, closed registers, failing blower) that may have caused a trip.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057487855987,"sku":"GOODMAN-2859","price":14.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-acvc960403bnba-20162907","provider":"National HVAC Parts","version":"1.0","type":"link"}