{"product_id":"westinghouse-626435r-furnace-limit-switch-220-200f-3-inch","title":"Westinghouse 626435R Furnace Limit Switch 220\/200F 3 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WESTINGHOUSE 626435R is an auto-reset furnace limit switch rated to open at 220 degrees F and close at 200 degrees F. This thermal safety device monitors supply-air or heat exchanger temperatures inside a forced-air furnace and interrupts the burner circuit when temperatures exceed the set point, protecting the heat exchanger from overheat damage. Once temperatures drop back to the closing threshold, the switch resets automatically without manual intervention. The 3-inch insert mount fits into the furnace plenum or blower compartment panel. HVAC technicians install this switch as a direct OEM-style replacement during routine safety inspections or after a nuisance-trip diagnostic.\u003c\/p\u003e\n\u003cp\u003eThis limit switch is suited for residential and light-commercial forced-air gas or oil furnace applications. The 3-inch insert style fits through a standard knockout or drilled opening in the furnace casing, positioning the sensing element inside the airstream or near the heat exchanger. It is commonly replaced when a furnace short-cycles, when the existing limit switch fails closed or open, or as part of a heat exchanger inspection and safety-device service. The 1\/2-degree differential between the open and close set points provides stable operation without excessive cycling.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAuto-reset operation — returns to closed position automatically once temperature drops to 200 degrees F\u003c\/li\u003e\n  \u003cli\u003eOpens at 220 degrees F to protect the heat exchanger from overtemperature conditions\u003c\/li\u003e\n  \u003cli\u003e3-inch insert length fits standard furnace casing cutouts\u003c\/li\u003e\n  \u003cli\u003e1\/2-degree operating differential for stable switching without nuisance cycling\u003c\/li\u003e\n  \u003cli\u003eSingle-speed rated — suitable for single-blower furnace configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement limit switch for residential and light-commercial forced-air furnaces requiring a 220 degrees F opening, 200 degrees F closing, auto-reset, 3-inch insert limit switch.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eA licensed HVAC technician should install this limit switch. Shut off all power to the furnace at the disconnect and set the thermostat to off before removing the existing switch. The insert should be fully seated through the furnace panel so the sensing element is positioned correctly in the airstream — improper insertion depth will cause false trips or no-trip conditions. After installation, restore power and verify proper furnace operation through a complete heating cycle before returning the system to service.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpening Temperature\u003c\/strong\u003e: 220 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClosing Temperature\u003c\/strong\u003e: 200 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Type\u003c\/strong\u003e: Auto Reset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Differential\u003c\/strong\u003e: 1\/2 degree F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeed Rating\u003c\/strong\u003e: 1-Speed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Furnace\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WESTINGHOUSE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 626435R\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WESTINGHOUSE","offers":[{"title":"Default Title","offer_id":51283986088242,"sku":"626435R","price":27.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277880.jpg?v=1781065120","url":"https:\/\/voomisupply.com\/products\/westinghouse-626435r-furnace-limit-switch-220-200f-3-inch","provider":"Voomi Supply","version":"1.0","type":"link"}