The salt not reducing down may be caused of a wide range of issues.
1. The valve isn't regenerating because of a mechanical problem.
2. Salt might be crossed over (solidifying) above water line from the base of the salt tank.
3. On the off chance that you have been utilizing pellet salt for a long time, you could have a considerable measure of undissolved buildup at the base of the tank. This buildup won't disintegrate and furthermore can shut water stream all through the salt tank.
4. Your valve could be neglecting to draw the brine water arrangement out and in the event that you have a buoy/ float shutoff in your brine water tank, this could keep the salt tank from flooding (which it could do if the buoy shutoff mechanism was not operational).
5. The brine solution refill control could be stopped up or clogged, which may prevent the water to refill the salt tank.