{"product_id":"oem-goodman-m4-primary-limit-switch-for-amh80603anaa-furnace-20162906","title":"OEM Goodman M4 Primary Limit Switch for AMH80603ANAA Furnace — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman 20162906 is a genuine OEM primary high-limit switch built for the Amana\/Goodman \u003cstrong\u003eAMH80603ANAA\u003c\/strong\u003e gas furnace. Mounted on the heat exchanger bulkhead, this safety control continuously monitors supply-air temperature and opens the ignition circuit if the furnace overheats — protecting the heat exchanger and preventing a fire hazard from restricted airflow, a failed blower, or a dirty filter. It is an auto-reset (M4-series) bimetal disc switch calibrated to the furnace's factory trip point.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 20162906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e M4 primary high-limit, auto-reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Overheat \/ high-temperature safety cutout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Amana\/Goodman AMH80603ANAA and compatible models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bracket \/ heat exchanger panel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e switch is factory-calibrated to the precise open\/close temperature the furnace was designed around. Generic limit switches may carry a different trip temperature, which can cause nuisance short-cycling or, worse, fail to protect the unit. For a safety device, matching the OEM calibration matters.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Easy to moderate.\u003c\/strong\u003e Cut power, remove two mounting screws and the wire harness, and swap. Note wire orientation before disconnecting. A technician should verify the airflow issue that caused the original trip.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057604084083,"sku":"GOODMAN-5076","price":18.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-amh80603anaa-furnace-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}