The answer to 'toilet repair not working' is that there are several common causes for a toilet that isn't flushing properly or is not working as expected. Some of the most common issues include a clogged toilet, a faulty flush mechanism, a problem with the tank fill valve, or a leak in the toilet.
If your toilet is not flushing correctly, the first thing to check is for any clogs or blockages in the toilet itself or the drain line. You can try using a plunger or a toilet auger (also called a closet auger or plumber's snake) to clear the clog. If that doesn't work, you may need to disassemble the toilet to check for other issues. Other common problems include a faulty flush mechanism, a fill valve that isn't working properly, or a leak in the tank or bowl. Depending on the specific issue, some toilet repairs can be done as a DIY project, but for more complex problems, it's best to call in a professional plumber.