The answer to 'water softener constantly running' is that there are several common causes, including a stuck valve, a problem with the timer, or a leak in the system. This can result in the softener running continuously, wasting water and energy.
Some common symptoms include the softener cycling frequently, low water pressure, or the tank not refilling properly. Potential solutions may involve adjusting the timer, replacing a faulty valve, or repairing any leaks. If the issue persists, it's best to call a professional plumber to diagnose and fix the problem.