{"product_id":"oem-goodman-manual-reset-high-limit-switch-for-acss921005cnaa-10123540","title":"OEM Goodman Manual Reset High-Limit Switch for ACSS921005CNAA — 10123539","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e10123539 Manual Reset Limit Switch\u003c\/strong\u003e is a genuine OEM safety control for the \u003cstrong\u003eACSS921005CNAA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. This high-limit \/ rollout switch monitors heat-exchanger or burner-area temperature and cuts power to the gas valve if the furnace overheats — protecting against cracked heat exchangers, blocked airflow, and flame rollout. Because it is a \u003cem\u003emanual reset\u003c\/em\u003e device, it must be pressed to restore operation once a fault has been corrected, alerting the homeowner that a real problem occurred.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 10123539\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (genuine OEM)\u003c\/li\u003e\n\u003cli\u003eComponent Type: Manual reset high-limit \/ rollout safety switch\u003c\/li\u003e\n\u003cli\u003eFunction: Opens on over-temperature to de-energize the gas valve\u003c\/li\u003e\n\u003cli\u003eReset: Manual (push-button)\u003c\/li\u003e\n\u003cli\u003eEquipment: Furnace\u003c\/li\u003e\n\u003cli\u003ePrimary Fit: ACSS921005CNAA (verify the temperature rating stamped on your original switch)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine Goodman switch is calibrated to the exact trip temperature specified for this furnace's heat exchanger and burner geometry. Generic limit switches with the wrong trip point can allow dangerous overheating or cause repeated nuisance lockouts. As a life-safety component, an exact-match OEM part is strongly recommended and protects your warranty.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Requires removing the burner\/control panel, disconnecting two spade terminals, and unscrewing the switch from its bracket. Shut off all power and gas before servicing, and never bypass a safety switch. If your switch keeps tripping after replacement, have a licensed HVAC technician diagnose the underlying overheating cause.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057458364787,"sku":"GOODMAN-2389","price":11.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-manual-reset-high-limit-switch-for-acss921005cnaa-10123540","provider":"National HVAC Parts","version":"1.0","type":"link"}