New gc2227hek5 will not dispense ice/water

Question

I have a new fridge/freezer Maytag model gc2227hek5. My kitchen fitter and plumber have installed the FF ? which looks fine but we have a problem?The water is connected fine? and it makes ice. However it will not dispense ice or water. The lights on the dispenser panel work, it is NOT locked ?. But simply nothing happens. We have tried it both with and without the filter.Any thoughts? I am wondering if it is something simple or if it will need a service call.thanks!