What should you do if the water temperature in a system approaches boiling point?

When the water temperature in a system approaches boiling point, shutting down the system is a critical safety measure. Approaching the boiling point can indicate that the system is under potential risk of overheating or creating excessive vapor pressure, which could lead to equipment failure or even a hazardous situation.

By shutting down the system, you can prevent further temperature increase and mitigate the risk of damage or accidents. This action allows for a safe assessment of the system's conditions and any necessary repairs or adjustments to be made without the pressure or temperature escalating.

While options like increasing the pressure or opening the relief valve may seem like immediate responses, they do not address the root issue effectively and could exacerbate safety risks. Monitoring and waiting for stabilization may be appropriate under controlled conditions, but in this scenario, active measures are required to ensure safety, which makes shutting down the system the most prudent course of action.