Hi! I just replaced my water filter today on my side by side GE refrigerator. Same thing!!! Loud hammering sound and NO WATER! I finally decided to remove the housing cover for the water filter. I was determined I would fix this daggone thing. Anyhow, I found the culprit!!!! I pushed up above where the water filter goes and noticed a PIECE OF STYROFOAM!!! I wondered why I was able to get water with the original filter but not with the replaced GE water filter. I suppose they put that styrofoam there when the refrigerator was delivered. Anyhow, I removed that piece of styrofoam, and put the NEW water filter on and put the cover back on and, VOILA, PROBLEM FIXED!!!!! I NOW HAVE WATER COMING FULL FORCE FROM THE DISPENSER!!! I’m going to call GE tomorrow to ask them WHY they wouldn’t tell people about that piece of styrofoam. It’s such a simple fix; but, seeing how many other people are having the same problem, I thought I would let you all know! HOPE THIS HELPS!!! Good Luck!!!