Unstable or Fluctuating Boiler Pressure
A faulty boiler pressure-reducing valve can cause system pressure to become too high, too low, or unstable. If the valve sticks open, excess water can enter the boiler, causing excessive pressure, water discharge from the relief valve, and added stress on boiler components. If the valve becomes clogged or fails to feed properly, system pressure can drop too low and may cause the boiler to shut down.
Wear, sediment, mineral buildup, or damaged internal components can also cause fluctuating pressure, irregular boiler operation, or noises such as whistling, buzzing, or water hammer. These symptoms can indicate that the valve is no longer regulating boiler pressure properly.
