{"product_id":"oem-goodman-auxiliary-limit-switch-light-blue-for-wfd18090s4bxcb-0130f00038","title":"OEM Goodman Auxiliary Limit Switch Light Blue for WFD18090S4BXCB — 0130F00038","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e0130F00038 Auxiliary Limit Switch (Light Blue)\u003c\/strong\u003e is a genuine OEM thermal safety control for the \u003cstrong\u003eWFD18090S4BXCB\u003c\/strong\u003e gas furnace. The light-blue color code identifies its specific trip temperature. As an auxiliary limit, it provides secondary overheat protection — typically monitoring the blower compartment or a secondary section of the heat exchanger — and opens the control circuit to stop the burners if temperatures exceed safe limits.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 0130F00038\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Auxiliary High-Limit Thermal Switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor Code:\u003c\/strong\u003e Light Blue (denotes specific trip temperature)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Secondary overheat \/ rollout safety cutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (fits Amana)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e WFD18090S4BXCB and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eLike the primary limit, this auxiliary switch is factory-calibrated — the light-blue code marks its exact rating. Substituting an incorrectly rated generic switch defeats the safety design. Match the OEM 0130F00038 by both part number and color code to ensure the furnace's safety chain functions as engineered.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1 of 5).\u003c\/strong\u003e Disconnect power, remove the mounting screws, transfer the spade terminals, and reinstall the new switch in the same position and orientation. Test a full heat cycle to confirm normal operation before closing the cabinet.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058216452467,"sku":"GOODMAN-13864","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-auxiliary-limit-switch-light-blue-for-wfd18090s4bxcb-0130f00038","provider":"National HVAC Parts","version":"1.0","type":"link"}