The answer to 'boiler making noise' is that there are several common causes, including sediment buildup, worn components, or issues with the pressure relief valve. Symptoms may include banging, rumbling, or whistling noises coming from the boiler. While some minor issues can be DIY-fixed, it's generally best to call a professional HVAC technician to diagnose and repair boiler noises, as they can be a sign of a more serious problem that requires expertise to address safely.
Boiler noises should not be ignored, as they can indicate dangerous pressure buildup or other hazardous conditions. An HVAC technician can properly inspect the system, identify the root cause, and make any necessary repairs or adjustments to restore quiet, safe operation.