When flushing my toilet, the water in the bowl doesn't flush away. Instead, the water rises and overflows, unless I turn off the water valve. Any ideas what's causing this and what I can do to fix the problem?
Sounds to me like it is just plugged. Did you try plunging it. It may take a lot of plunging. If that doesn't work try using a snake on it. I don't have a whole lot of experience in plumbing, but since noone else answered.