I have a Culligan water softener and noticed recently that there is a running water sound coming from where my softener meets with the washer. There is no leaking, and the sound is almost like a constant trickle. It stops if we bypass the softener. any ideas? Culligan charges a fortune for a service call not to mention any parts. There are no error codes on the display and the owner's manual is not very helpful for troubleshooting.