This worked for me with the SAME PROBLEM: open the freezer door and push the freezer door switch (with door open) and start pumping water form the water dispenser (don't let go freezer door switch) push water dispenser for 5 to 30 seconds, then let go, then push dispenser again for 5-30 seconds, then let go, and so on, for 2 minutes, after that, water should start flowing/dispensing, you will run and throw away about/aproximately 2.5 gallons water to get clean water and good flow. ALSO, make sure you have replased your filter on time for clean and proper water dispensing.
HOPE IT HELPS :)