If a pressure relief valve is constantly opening, what is a possible cause?

When a pressure relief valve is constantly opening, it typically indicates that pressure within the system exceeds its design limits. This situation often arises in scenarios where the system is overfiring. Overfiring can lead to excessive heat generation, increasing the pressure of the system beyond safe operating levels. The pressure relief valve is engineered to prevent equipment damage or failure by allowing excess pressure to safely escape. Consequently, if the valve is recurrently activating, it suggests that the system is producing more heat and pressure than it is engineered to handle, reinforcing the notion of overfiring as a potential cause.

While other possibilities, such as a defective valve or low system pressure, could also be considered, they don't align as closely with the observed behavior of continuous valve opening due to essentially rising pressures. Therefore, overfiring stands out as the most plausible root cause in this context.