It sounds like your valve head isn't working properly and all of your salt is going down the drain. There should be a way to rotate your valve thru the different stages for a recharge such as fill, brine, backwash, rinse, service. check to see if this valve rotates and makes different sounds at each position. When it is in the service position with no water being used in the house there should be no sound. Next, start a recharge and make sure that the motor actually is moving the valve to the different positions. Let us know what you find.