{"product_id":"oem-goodman-m4-primary-limit-switch-for-gch90453bxab-20162906","title":"OEM Goodman M4 Primary Limit Switch for GCH90453BXAB — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003e20162906\u003c\/strong\u003e M4 primary high-limit switch is a factory OEM safety control for the Goodman \u003cstrong\u003eGCH90453BXAB\u003c\/strong\u003e furnace and compatible models. Mounted on the heat exchanger, this thermal limit monitors supply-air temperature and shuts off the gas valve if the furnace overheats — protecting the heat exchanger and preventing dangerous conditions from restricted airflow, a failed blower, or a dirty filter. A tripped or failed limit switch causes short-cycling on heat or a furnace that fires briefly then shuts down.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 20162906\u003c\/li\u003e\n\u003cli\u003eType: M4 Primary High-Limit Switch (auto-reset)\u003c\/li\u003e\n\u003cli\u003eCategory: Limit Switch \/ Safety Control\u003c\/li\u003e\n\u003cli\u003eFits Model: GCH90453BXAB (and compatible Goodman furnaces)\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman 20162906\u003c\/strong\u003e is calibrated to the exact trip and reset temperatures required by this furnace's heat exchanger design. Generic limit switches with the wrong setpoint can nuisance-trip or, worse, fail to open at the correct temperature. For a life-safety control, use the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Intermediate\u003c\/strong\u003e — disconnect power, remove two mounting screws and the wire connectors, and install the replacement in the same orientation. Typically a 15-minute job.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058051957107,"sku":"GOODMAN-20162906","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-gch90453bxab-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}