How do you increase the water pressure or tell if there is a kink in the line of a side-by-side refrigerator that has low water pressure from the water dispenser?

If it was working before then you probably need to replace the filter. New install? Check for obstructions, but I would replace the filter on that one, too.

You can try changing the water filter and see if that helps. Some refrigerator filters now come with a fast flow filter that may fit your refrigerator. I know that Whirlpool does have upgrades. If that's not it i would look for your shut off valve to the fridge. It may be partially closed or have a kink in the water line.