The answer to 'toilet repair not working' is that there are several common causes, including a faulty flush valve, a clogged or damaged fill valve, or a problem with the tank-to-bowl gasket. Symptoms may include the toilet not flushing properly, constantly running water, or the tank not filling up.
For minor issues, homeowners can often DIY the repair by replacing the flush valve or fill valve. However, for more complex problems like a cracked tank or a faulty wax ring, it's best to call a professional plumber who can properly diagnose and fix the issue.