{"product_id":"nordyne-626435r-limit-switch","title":"Nordyne 626435R Limit Switch","description":"\u003cp\u003eThe \u003cstrong\u003eNordyne 626435R Auto Limit Switch\u003c\/strong\u003e is a critical OEM safety component engineered for precision temperature monitoring in gas-fired and electric furnaces. This \u003cstrong\u003ehigh-limit safety control\u003c\/strong\u003e features a \u003cstrong\u003e3-1\/8 inch insert length\u003c\/strong\u003e and is calibrated to open between \u003cstrong\u003e200?F and 220?F\u003c\/strong\u003e. As a primary safety device, it prevents heat exchanger damage and hazardous conditions by interrupting the burner circuit if the plenum temperature exceeds specified tolerances. Designed as an \u003cstrong\u003eautomatic reset limit switch\u003c\/strong\u003e, it restores circuit continuity once temperatures drop back to safe operating levels. For technicians troubleshooting \u003cstrong\u003efurnace short cycling\u003c\/strong\u003e or a \u003cstrong\u003eblower motor running continuously\u003c\/strong\u003e, replacing a drifted or failed switch with this genuine \u003cstrong\u003eNordyne replacement part\u003c\/strong\u003e ensures the system adheres to original manufacturer specifications and safety protocols. This switch is a direct replacement for various Intertherm, Miller, and Nordyne air handlers and furnaces requiring a L220-20F fixed temperature response.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits for HVAC Professionals\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenuine OEM Replacement:\u003c\/strong\u003e Ensures exact fitment and electrical compatibility without the reliability risks of universal aftermarket alternatives.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInternal Safety Protection:\u003c\/strong\u003e Protects the heat exchanger from thermal stress and potential cracks caused by restricted airflow or over-firing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAutomatic Reset Functionality:\u003c\/strong\u003e Minimizes nuisance lockouts by allowing the system to resume operation once it returns to a safe thermal state.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDefined Thermal Response:\u003c\/strong\u003e Specifically rated for a 200-220?F range to meet the specific static pressure and airflow requirements of compatible Nordyne cabinets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Installation \u0026amp; Troubleshooting Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat causes a Nordyne 626435R to trip repeatedly?\u003c\/strong\u003e\u003cbr\u003e\nWhile the switch itself may be failing, frequent tripping usually indicates an airflow restriction, such as a clogged filter, blocked return air grilles, or a failing blower motor. Always check secondary heat exchangers for soot buildup or obstructions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use a 5-inch insert if the 3-1\/8 inch is out of stock?\u003c\/strong\u003e\u003cbr\u003e\nNo. The \u003cstrong\u003e3-1\/8\" insert length\u003c\/strong\u003e is specific to the depth of the plenum. Using a longer probe may interfere with internal components or place the sensor too close to the heat source, leading to inaccurate temperature readings and premature tripping.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this switch handle high-voltage or low-voltage circuits?\u003c\/strong\u003e\u003cbr\u003e\nThis limit control is typically wired into the 24V safety pilot circuit. Verify your specific wiring diagram to ensure the contact rating matches your furnace's control board requirements.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Nordyne","offers":[{"title":"Default Title","offer_id":35643787340,"sku":"626435R","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_bd5eb8a2-4433-4752-82e1-f6643bde773d.png?v=1772595156","url":"https:\/\/www.gsistore.com\/en-ca\/products\/nordyne-626435r-limit-switch","provider":"GSIstore","version":"1.0","type":"link"}