What should be done if the pressure gauge indicates a high reading?

A high reading on the pressure gauge typically indicates that the system is experiencing excessive pressure, which can pose serious safety risks. The best course of action is to reduce the heat input immediately. This helps to prevent any further increase in pressure that could lead to equipment failure or a potential hazard. Additionally, inspecting the pressure relief valve is crucial because this component is designed to safely release excess pressure and prevent dangerous situations. Ensuring that the pressure relief valve is functioning properly is essential for maintaining the safety of the system. Therefore, the correct response to a high pressure reading is to reduce heat input and inspect the pressure relief valve, as it directly addresses the safety concerns associated with high pressure in a boiler or similar system.