{"product_id":"oem-goodman-primary-limit-switch-purple-for-wfd18070s3axcb-0130f00035","title":"OEM Goodman Primary Limit Switch (Purple) for WFD18070S3AXCB — 0130F00035","description":"\u003cp\u003eThe Goodman 0130F00035 is a genuine OEM primary limit switch — identified by its purple housing — for the \u003cstrong\u003eWFD18070S3AXCB\u003c\/strong\u003e furnace. Mounted on the heat exchanger bulkhead, the primary limit continuously monitors supply-air temperature. If airflow is lost (from a dirty filter, failed blower, or closed dampers) and temperatures climb past the factory setpoint, the switch opens the circuit to the gas valve and shuts the furnace down, protecting the heat exchanger from cracking.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Primary high-limit safety switch (auto-reset)\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 0130F00035\u003c\/li\u003e\n\u003cli\u003eColor code: Purple (denotes model-specific trip temperature)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman WFD18070S3AXCB and compatible furnaces\u003c\/li\u003e\n\u003cli\u003eFunction: Opens gas circuit on high supply-air temperature\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe purple color code corresponds to a specific factory-calibrated trip temperature. Installing the correct OEM 0130F00035 guarantees the furnace shuts down at the intended threshold. Generic switches or the wrong color-coded limit can trip too early (nuisance shutdowns) or too late (heat exchanger damage). For this safety control, match the OEM part exactly.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e The limit switch mounts with two screws to the heat exchanger panel and connects with two spade terminals — about a 15-minute job with a nut driver. Disconnect power and gas before servicing. If the original switch tripped, diagnose and correct the airflow restriction before restoring operation.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058215764339,"sku":"GOODMAN-13839","price":34.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-purple-for-wfd18070s3axcb-0130f00035","provider":"National HVAC Parts","version":"1.0","type":"link"}