My experience is that you should have them test the new one before you leave the store. If they don't want to then don't buy. The worst time to find out that it doesn't work is after you've already installed it. Plus, while I've always had the first one work, one time my buddy when through two in the store that didn't work and finally the third one did and was fine after install.

It really does seem to be a solenoid issue if something does pop up with the rebuilds.

-Rog