{"product_id":"oem-goodman-300f-primary-limit-switch-for-dds80904bxa-b1370195","title":"OEM Goodman 300F Primary Limit Switch for DDS80904BXA — B1370195","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370195 Primary Limit Switch\u003c\/strong\u003e is the genuine OEM high-temperature safety control for the \u003cstrong\u003eDDS80904BXA\u003c\/strong\u003e gas furnace and related Goodman\/Amana 80% AFUE units. Mounted on the heat-exchanger partition, this normally-closed limit opens the burner circuit if plenum temperatures exceed a safe threshold — the primary protection against a blocked filter, failed blower, or restricted ductwork overheating the furnace.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutoff temperature:\u003c\/strong\u003e 300°F (auto-reset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Primary high-temperature safety limit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact type:\u003c\/strong\u003e Normally closed (opens on temperature rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits model:\u003c\/strong\u003e Goodman DDS80904BXA and compatible furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e B1370195\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e limit is set to Goodman's exact 300°F factory trip point with the correct insertion depth and bracket. Because this switch protects the heat exchanger, matching the factory calibration matters — an off-spec generic can trip early (short-cycling, no heat) or too late (overheating risk). Choose OEM for a guaranteed-correct safety response.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5)\u003c\/strong\u003e — Two mounting screws and two spade connectors. De-energize power and shut off the gas valve first. A straightforward 15–20 minute repair for a DIYer comfortable inside a furnace cabinet.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058012569971,"sku":"GOODMAN-9451","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-300f-primary-limit-switch-for-dds80904bxa-b1370195","provider":"National HVAC Parts","version":"1.0","type":"link"}