If these steps do not fix the issue, it may possibly stay time to call a professional plumber to inspect and also heal their garbage disposer. Grinding noises could suggest a more serious problem with their motor or perhaps blades that will require replacement or servicing. Be Sure You always focus on safety plus follow manufacturer instructions when working on appliances.Another reason to the loud grinding noise could be due to worn out or damaged cutting blades. Assuming you suspect here is the case, you will need to replace the blades. There is replacement cutting blades in most diy stores or perhaps contact the manufacturer for a specific substitution part.