{"product_id":"oem-goodman-m4-primary-limit-switch-for-amvc960603bnba-20162906","title":"OEM Goodman M4 Primary Limit Switch for AMVC960603BNBA — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe genuine Goodman \u003cstrong\u003e20162906\u003c\/strong\u003e M4 primary limit switch is a factory OEM high-temperature safety control for the \u003cstrong\u003eAMVC960603BNBA\u003c\/strong\u003e modulating variable-speed gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger bulkhead, this auto-reset thermal switch monitors supply-air temperature and opens the control circuit to shut down heating if airflow is lost or the furnace overheats — protecting the heat exchanger from cracking and the cabinet from heat damage. It automatically resets once temperatures return to a safe range.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003ePart Type: M4 Primary High-Limit Switch\u003c\/li\u003e\n\u003cli\u003eContact Configuration: Normally Closed, auto-reset\u003c\/li\u003e\n\u003cli\u003eFunction: Supply-air overtemperature protection\u003c\/li\u003e\n\u003cli\u003eCompatible Model: AMVC960603BNBA\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman \/ Amana\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 calibrated to the exact trip point and mounting footprint for this furnace. Generic substitutes with different setpoints or bracket dimensions can cause nuisance lockouts or inadequate protection. As a primary safety control, OEM calibration matters.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5)\u003c\/strong\u003e — remove the mounting screws, transfer the wire connectors, and seat the new switch flush against the heat exchanger. Cut gas and power before servicing; repeated tripping usually signals a blower\/airflow or filter problem that must be corrected.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057995628915,"sku":"GOODMAN-9034","price":27.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-amvc960603bnba-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}