Answer to: Refrigerator Will not dispense water after replacing filter.I had the same issue and tried all of the above. I resolved it by reducing the water pressure to the fridge. My water hookup has a spigot handle like a garden spigot. With someone dispensing water (or trying to) I very slowly decreased the pressure by closing the valve until it stopped "hammering" and began to dispense water. I over-shot a few times adn had to keep adjusting until I found the most pressure without the ill side effects.
Answer to: Refrigerator Will not dispense water after replacing filter.I had the same "hammering" problem. For me, replacing the new filter with the old still produced the same results. It turned out that the water pressure was too high for the filter. I have a spigot attached to my water supply. I replaced the o-rings, turned off the water source and while the water dispenser was running, I slowly turned it up until the "hammering" started. Then I backed off on the spigot a bit until the 'hammering" stopped. No more issues.