{"product_id":"oem-goodman-auxiliary-limit-auto-reset-switch-for-gmp100-4-20269903","title":"OEM Goodman Auxiliary Limit Auto-Reset Switch for GMP100-4 — 20269903","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20269903 Auxiliary Limit Auto-Reset Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control engineered for the Goodman \u003cstrong\u003eGMP100-4\u003c\/strong\u003e gas furnace. This thermally-activated switch monitors heat exchanger and plenum temperatures, interrupting the burner circuit if the furnace overheats and automatically restoring operation once safe temperatures return. It is a critical safety component required for proper and code-compliant furnace operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Auxiliary limit \/ high-limit safety switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Style:\u003c\/strong\u003e Automatic (self-resetting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Goodman GMP100-4 and compatible furnace platforms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 20269903\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis is the \u003cstrong\u003efactory OEM part\u003c\/strong\u003e, calibrated to Goodman's exact trip and reset temperature setpoints. Generic aftermarket limit switches often carry approximate temperature ratings that can cause nuisance shutdowns or, worse, fail to protect the heat exchanger. For a safety control, OEM calibration is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1 of 5).\u003c\/strong\u003e Two-screw mount with quarter-inch spade terminals. Always shut off gas and power before servicing. If you are unsure of correct placement, consult a licensed HVAC technician.\u003c\/p\u003e\u003cp\u003eCompatible with your GMP100-4? Match the OEM part number 20269903 to your existing switch before ordering to guarantee an exact fit.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058136924531,"sku":"GOODMAN-11885","price":21.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-auxiliary-limit-auto-reset-switch-for-gmp100-4-20269903","provider":"National HVAC Parts","version":"1.0","type":"link"}