Product review (5 stars): Painless Replacement
If this is the part you need to get your ice maker or water dispenser up and running again, it's a cheap, quick and painless replacement, even if you've never worked on an appliane before.  I wish I had done a few basic tests before I took the time to replace mine; I'd have found the existing solenoid was working just fine.

In my case, I'd first installed a water hammer arrestor.  That installation got the ice maker up and running properly, but I still had problems with the water dispenser; it would dispense about an ounce of water before going dry.  I decided to replace this part second, as it was the least expensive to try.  I should have done the following instead:

1. Remove the front kick plate and disconnect the water line from the quick connect that leads to the freezer door.  Plop that line into a bucket and activate the water dispenser.  How's the water flow?  If it's good and fast at that point, you probably have a frozen line in your freezer door.  Mine was still real bad at that point.  Reconnect everything.

2. Disconnect the line from the solenoid and insert that line into a bucket.  Turn the water back on.  Fast?  Great, replace the solenoid.  Slow?  Keep looking!

3. Remove the water filter from inside of the refrigerator and install the bypass plug.  Turn the water back on.  Fast?  Okay, replace the water filter.  Slow?  Keep at it!

4. Disconnect the inlet line, put THAT line in a bucket, and turn the water on.  Slow? Replace the line running to the refrigerator, or you may have a larger plumbing issue.  Sorry to hear that.  Fast?  Great!  Replace the water filter assembly.

Ultimately, I had to replace my water filter assembly.  Had I done these tests before, instead of after, I replace the solenoid, I'd have saved the ten minutes I spent replacing it, plus the ten I just spent typing.