{"product_id":"bard-hvac-8402-120-limit-control","title":"Bard HVAC 8402-120 Limit Control","description":"\u003cp\u003eThe \u003cspan\u003e\u003cstrong\u003eBard HVAC\u003c\/strong\u003e \u003c\/span\u003e\u003cstrong\u003e8402-120 Limit Control\u003c\/strong\u003e is a purpose-built \u003cstrong\u003eL210 manual reset limit switch\u003c\/strong\u003e designed for critical thermal protection in \u003cstrong\u003eBard HVAC equipment\u003c\/strong\u003e. This \u003cstrong\u003eOEM \u003cspan\u003eBard HVAC \u003c\/span\u003ereplacement part\u003c\/strong\u003e functions as a high-limit safety, monitoring internal temperatures to prevent \u003cstrong\u003efurnace overheating\u003c\/strong\u003e. Operating as a normally closed switch, it opens the electrical circuit when temperatures reach the fixed \u003cstrong\u003e210-degree Fahrenheit\u003c\/strong\u003e threshold. Unlike automatic reset controls, this \u003cstrong\u003emanual reset limit control\u003c\/strong\u003e requires a technician to physically engage the reset button, ensuring that the root cause of the high-heat event—such as a \u003cstrong\u003eclogged air filter\u003c\/strong\u003e, failing blower motor, or restricted return air—is identified and addressed. The robust design and precise calibration make the \u003cstrong\u003eBard 8402-120\u003c\/strong\u003e essential for maintaining the operational integrity of \u003cstrong\u003ewall-mount air conditioners and heat pumps\u003c\/strong\u003e. Professional installation is recommended to ensure correct \u003cstrong\u003elimit switch wiring\u003c\/strong\u003e and system safety.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical Thermal Safety:\u003c\/strong\u003e Fixed L210 setpoint provides reliable high-limit protection for \u003cstrong\u003eHVAC systems\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Troubleshooting Support:\u003c\/strong\u003e Manual reset functionality forces a system inspection after a trip, preventing repeated overheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Exact \u003cstrong\u003eBard replacement part\u003c\/strong\u003e simplifies installation in Bard wall-mount and package units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Construction:\u003c\/strong\u003e Built to withstand the high-temperature environments of heat exchangers and blower compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Questions \u0026amp; Technical Inquiries\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does my \u003cspan\u003eBard HVAC \u003c\/span\u003e8402-120 limit control keep tripping?\u003c\/strong\u003e\u003cbr\u003eRepeated tripping typically indicates restricted airflow. Check for \u003cstrong\u003eclogged air filters\u003c\/strong\u003e, blocked supply registers, or a failing blower motor that isn't moving enough air across the heat exchanger.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a manual reset limit with an automatic reset limit?\u003c\/strong\u003e\u003cbr\u003eNo. Safety controls must be replaced with the exact OEM specifications. A manual reset switch is a safety requirement to ensure \u003cstrong\u003eoverheating\u003c\/strong\u003e issues are manually investigated by a technician.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between 8402-120 and 8402-120BX?\u003c\/strong\u003e\u003cbr\u003eThe \"BX\" suffix indicates bulk packaging used by Bard. The technical specifications and \u003cstrong\u003eHVAC compatibility\u003c\/strong\u003e are identical for both part numbers.\u003c\/p\u003e\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":"Bard HVAC","offers":[{"title":"Default Title","offer_id":42885526192306,"sku":"8402-120","price":23.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_cbc8f9a7-38d1-47fb-8104-3b169be83ca7.png?v=1780530462","url":"https:\/\/www.gsistore.com\/products\/bard-hvac-8402-120-limit-control","provider":"GSIstore","version":"1.0","type":"link"}