I had a old faucet which was hard to turn off so I just replaced it. Now the new one is doing the same thing. And when I mean hard, I mean I can't turn off the water unless I turn off the supply. So I took it apart and reset the valve seat. It then would turn on nicely and then you hear a little thump and the valve seat is stuck in the up position(I believe). Any ideas with how to fix it. This is only happening on the cold side. I have tried not turning my water all the way on, just maybe a 1/4 of the way and it still gets stuck. The faucet is in the back of the house so it is not close to the main line from the street. Please help!