{"product_id":"oem-goodman-m4-primary-limit-switch-for-acec960403bnab-20162907","title":"OEM Goodman M4 Primary Limit Switch for ACEC960403BNAB — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman 20162906 is a genuine OEM M4 primary limit switch for the ACEC960403BNAB furnace. Mounted on the heat-exchanger\/blower bulkhead, this auto-resetting control senses supply-air temperature and opens the gas-valve circuit if airflow is inadequate and the cabinet overheats. It is the furnace's primary thermal safety, protecting the heat exchanger from cracking and shutting down the burners during airflow faults such as a clogged filter or stalled blower.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003eType: M4 primary high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: Normally closed, opens on overtemperature\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (recloses when temperature normalizes)\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman \/ Amana ACEC960403BNAB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe primary limit is a calibrated safety device. The genuine Goodman 20162906 has the correct trip temperature, disc location, and mounting bracket for this model. Generic limits with the wrong setpoint cause short cycling or fail to protect the unit. For any safety control, OEM is the right choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Disconnect power, remove the blower-compartment panel, unfasten the two mounting screws, transfer the wire connectors, and remount. Verify proper furnace operation and temperature rise after replacement.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057164829043,"sku":"GOODMAN-108","price":14.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-acec960403bnab-20162907","provider":"National HVAC Parts","version":"1.0","type":"link"}