The answer to 'water softener constantly running' is that this is likely due to a problem with the softener's control valve or timer. The softener may be stuck in a regeneration cycle, the timer may be malfunctioning, or the control valve could be stuck open. This can lead to the softener continuously running and wasting water and salt.
Some common symptoms of a constantly running water softener include high water usage, excessive salt consumption, and the softener never shutting off. To troubleshoot, check the control panel for any error codes or reset the softener. You may need to replace the timer or control valve if they are malfunctioning. If the issue persists, it's best to call in a professional plumber to diagnose and repair the problem.