I am not getting any pressure out of the water dispenser or up to the ice maker. It just dribbles out of water dispenser and it is only making half of the ice it should. I completely thawed out the lines to make sure they weren't frozen and I replaced the water valve too. Still no pressure. What next?

Have you changed the filter? Good luck

Check the flow on both sides of the valve. To check after the valve unhook water line and press water dispenser switch to see what the flow is there. If you have a water filter or screen you need to replace it or clean the screen. A screen is put in the line and has fittings on both ends with a big cap at an angle. You turn off water and remove cap where you will find a fine mesh screen. Clean it well, sometimes you may need to soak it in vinegar for a while to remove scale. Hope this helps. DrTom4444