The answer to 'leak repair not working' is that there can be several common causes, such as a faulty valve, damaged pipes, or an issue with the plumbing fixture. Symptoms may include ongoing water leaks, dripping sounds, or water damage around the affected area. Solutions can range from tightening connections, replacing washers or gaskets, to more complex repairs like pipe replacement.
If a basic leak repair is not resolving the issue, it's best to call a professional plumber. They can diagnose the root cause and provide the right solution, whether it's a simple fix or requires more extensive work. Attempting complex plumbing repairs without the proper skills and tools can lead to further damage and higher repair costs in the long run.