What system has two temperature switches that alert you to overtemperature?

The system that features two temperature switches designed to alert you to overtemperature is the heating/defog ducting system. This is crucial for aircraft as maintaining appropriate temperatures is essential for safety and comfort. The two temperature switches serve as a redundancy mechanism, ensuring that the system can accurately measure and react to excessive temperatures. If one switch fails or does not operate correctly, the second provides a backup, enhancing safety by preventing overheating that could lead to system malfunctions or failure.

In the context of aircraft systems, the heating/defog ducting is specifically designed to manage air temperature to clear windows and maintain visibility in various weather conditions. By monitoring temperature closely, the system can ensure effective functioning, providing optimal performance and safety for pilots and passengers alike.