The answer to 'why is my boiler making loud noise' is that there are several common causes, including mineral buildup, low water levels, or a problem with the boiler's internal components. Loud noises coming from your boiler can be a sign of a serious issue that requires prompt attention.
Some common symptoms of a noisy boiler include banging, rumbling, or whistling sounds. These sounds can indicate that the boiler is not functioning properly and may need repair or maintenance. In some cases, the noises may be caused by a simple issue like a buildup of sediment, which can often be addressed through flushing the system. However, more complex problems like a faulty pump or valve may require the expertise of a professional HVAC technician.