{"product_id":"oem-goodman-m4-primary-limit-switch-for-gks91155dxac-20162906","title":"OEM Goodman M4 Primary Limit Switch for GKS91155DXAC — 20162906","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-temperature safety control for the \u003cstrong\u003eGKS91155DXAC\u003c\/strong\u003e gas furnace and related Goodman and Amana models. This normally-closed thermal switch monitors heat-exchanger and plenum temperature; if the furnace overheats due to a dirty filter, blocked ductwork, or blower failure, the limit opens and shuts off the burners to prevent damage and fire hazard. A failed or drifted limit switch causes short-cycling, no-heat lockouts, or a furnace that runs the blower continuously.\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 (auto-reset thermal)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally closed, opens on temperature rise\u003c\/li\u003e\n\u003cli\u003eFits Model: GKS91155DXAC (and compatible Goodman\/Amana furnaces)\u003c\/li\u003e\n\u003cli\u003eFunction: Overheat safety \/ burner cutout\u003c\/li\u003e\n\u003cli\u003eEquipment: Gas Furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003eOEM limit switch\u003c\/strong\u003e is calibrated to the precise cut-out and cut-in temperatures Goodman specified for your heat exchanger. Generic \"universal\" limits often have the wrong trip point or mounting flange, leading to premature tripping or, worse, failure to protect the unit. Choosing OEM keeps the factory safety margin intact and protects any remaining equipment warranty.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy\u003c\/strong\u003e, roughly 15–20 minutes. Cut power at the disconnect, remove the two mounting screws on the burner\/heat-exchanger panel, disconnect the two spade wire terminals, and install the replacement in the same orientation. Restore power and confirm a normal heat cycle. Work should be performed by a qualified HVAC technician following all local codes.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058101305715,"sku":"GOODMAN-10936","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-gks91155dxac-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}