The answer to 'sump pump making noise' is that a noisy sump pump is often a sign of a problem that needs to be addressed. Common causes include a worn-out or failing pump motor, an obstruction in the pump's intake or discharge line, or issues with the float switch that controls the pump's operation.
Some common symptoms of a noisy sump pump include grinding, squealing, or rumbling sounds. If the noise is accompanied by the pump running more frequently or not shutting off properly, it's likely time to investigate and address the issue. DIY homeowners may be able to troubleshoot and potentially replace a sump pump, but if the problem persists or you're unsure of the cause, it's best to call in a professional plumber to properly diagnose and fix the issue.