The answer to 'water line not working' is that there are several common causes, including frozen pipes, leaks, a problem with the main water shut-off valve, or a blockage in the line. Symptoms may include no water flow, low water pressure, or water pooling around the pipes.
To troubleshoot, first check the main shut-off valve to ensure it is fully open. If that's not the issue, you may need to locate and fix any leaks or clogs in the water line. For frozen pipes, you'll need to thaw them out safely. Some of these tasks can be DIY, but for major problems or if you're not comfortable working on the plumbing, it's best to call a professional plumber to diagnose and repair the issue.