Product review (4 stars): Four Different Filters, None Work
UPDATE: I am revising my review because I was incorrect with my conclusions. I finally got a technician to look at my problem and he said that it something he has seen before and it is air in the water line. His only advice was to keep working at it until the air is gone. I gave up after a while and just removed the fiter entirely. My model fridge does not require a plug. I'm somewhat annoyed with Whirlpool support; I can't be the only person to have had this problem.

I've tried four different filters with no success. With three of the filters, there was a loud hammering sound that persisted and sounded like it could damage the fridge. With this last purchase, there is a brief hammering noice then no water comes out of the dispenser, just a drop or two no matter how long I try.  When I put the old filter back in, the water flows with no problem. Unfortunately, I let the return window close so I am stuck with it.

I should add that I chatted with Whirlpool support. Apparently they have no history of this sort of problem. Their suggestion was to try another filter --which I did-- and if that didn't work --it didn't-- place a service call. They also recommended that I check if my model fridge is still eligible for their service plan. If I place a one-time service call for this problem then I become ineligible for their service plan. Either way, it sounds expensive.

I am at a loss as to how to get a replacement filter. Has anyone had luck with off-brand, non-Whirlpool filters.