Bard HVAC S8402-091 is a thermal cutoff device designed to protect HVAC systems from overheating and electrical damage. The component operates by sensing excessive temperature conditions and interrupting the electrical circuit when the preset limit is exceeded, preventing further heat buildup. It is commonly used in Bard wall-mounted units, packaged air conditioners, heat pumps, and h... https://www.partshnc.com/s8402-091-bard-hvac-thermal-cutoff