This high pressure cut-out switch is a must-have for any car or truck equipped with air conditioning and heating systems. It is designed to work seamlessly with Four Seasons brand components, ensuring reliable performance and durability. With its Mfr Code FSN and Manufacturer Part Number 35974, this switch is a perfect fit for a wide range of vehicles. Additionally, this product comes with a California Prop 65 Warning, indicating that it contains a chemical that may cause cancer or other reproductive harm. Please refer to the manufacturer's instructions for proper use and handling.