What is the primary function of an over temperature cut out in a hot water system?

The primary function of an over temperature cut out in a hot water system is to automatically shut off the heating element when the temperature exceeds a safe limit. This safety device is crucial for preventing overheating, which can lead to dangerous situations such as tank rupture or scalding injuries. By monitoring the water temperature, the over temperature cut out ensures that the system operates within its designed safety parameters. It protects both the equipment and the users by eliminating the risk associated with excessively high temperatures.

This is a fundamental aspect of hot water system safety, as temperatures that rise too high can compromise not just the longevity of the system components but also the safety of individuals using the hot water.