{"product_id":"oem-goodman-m4-primary-limit-switch-for-akss921155dxaa-20162906","title":"OEM Goodman M4 Primary Limit Switch for AKSS921155DXAA — 20162906","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e20162906 M4 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM safety control for the \u003cstrong\u003eAKSS921155DXAA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. This normally-closed thermal switch continuously monitors heat-exchanger temperature and cuts power to the gas valve if the furnace overheats — protecting the heat exchanger from cracking and preventing a fire hazard. A tripped or failed limit switch commonly causes short-cycling, no-heat calls, or blower-runs-constantly symptoms.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 20162906\u003c\/li\u003e\n\u003cli\u003eType: Primary high-limit switch (auto-reset, normally closed)\u003c\/li\u003e\n\u003cli\u003eMounting: M4 series bracket\u003c\/li\u003e\n\u003cli\u003eFunction: Overheat protection for the heat exchanger\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana AKSS921155DXAA furnace\u003c\/li\u003e\n\u003cli\u003eCategory: Safety \/ Limit control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM 20162906\u003c\/strong\u003e is factory-calibrated to the precise trip and reset temperatures specified for this furnace. Generic universal limits can trip early (nuisance no-heat) or late (unsafe overheating). For a safety-critical control, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate.\u003c\/strong\u003e Cut power at the disconnect, remove two mounting screws and the spade connectors, and reverse to install. Verify seating against the heat-exchanger surface. Best performed by a qualified HVAC technician.\u003c\/p\u003e\u003cp\u003eFast shipping and fitment support available at info@nationalhvacparts.com.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057540678003,"sku":"GOODMAN-3756","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-akss921155dxaa-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}