{"product_id":"oem-goodman-m4-primary-limit-switch-for-amec960603bnbb-20162906","title":"OEM Goodman M4 Primary Limit Switch for AMEC960603BNBB — 20162906","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e20162906 M4 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM temperature safety control for the Amana\/Goodman \u003cstrong\u003eAMEC960603BNBB\u003c\/strong\u003e gas furnace. Mounted on the heat exchanger housing, this primary auto-reset limit opens the control circuit if supply-air temperature climbs too high — typically from a dirty filter, blower failure, or blocked ductwork — shutting off the burners to protect the heat exchanger.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Type: Primary limit switch (M4-series)\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (closes when temperature returns to normal)\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003eFunction: Normally-closed, opens on high limit\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman \/ Amana\u003c\/li\u003e\n\u003cli\u003eFits Model: AMEC960603BNBB (and compatible AMEC960603 series)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe M4 limit's cutout temperature and insertion depth are tuned to this furnace's heat exchanger. An incorrect substitute can short-cycle the furnace or allow dangerous overheating. This OEM switch matches Goodman's factory calibration and bracket exactly.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5)\u003c\/strong\u003e — Cut power, disconnect the terminals, remove the two mounting screws, and install the replacement in the same orientation. Hand tools only. If the limit continues to trip, correct the airflow restriction before returning the unit to service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057574494579,"sku":"GOODMAN-4188","price":17.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-amec960603bnbb-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}