Kenmore Elite Steam dryer 61553 - steam will not work

The steam and steam refresh no longer works. The steam is not coming out of the steam dispenser inside the drum. Usually has a hissing sound when this happens...no hissing. This model of dryer is hooked up to the water line directly...we do not add water to a receptacle like some steam dryers. Water is turned on and water line is clear. We removed the cover from the steam dispenser and cleaned the head with CLR and still does not work.