Why is My Toilet Running all of a sudden?
A running toilet could be caused by a few problems, but the problem is usually simple to fix. The first step most people take is to try and flush again to see if the flush mechanism is stuck. If it isn’t, the next step to finding the issue is to investigate the running toilet cistern and see if there is an obvious problem, such as damaged components.
Once you remove the cistern lid, check that the water level in the cistern is at the water line. If it is below the line, make sure the water valve is fully turned on. If not, make any necessary adjustments and the water should start to fill the tank. If not, there might be another problem.
Sometimes a common cause of constant water running in the bowl is something wrong with the flapper. The flapper is a plug-like component in your toilet which releases water from the tank into the bowl via a valve when you flush it. This problem could be as simple as the flapper being stuck and not covering the valve properly or being damaged or dirty. Give the flapper and its chain a quick check to make sure it isn’t stuck, tangled or too dirty to effectively close the valve. If the flapper or chain is damaged or dirty, it might need cleaning or replacing.
These are just a couple of simple tricks to try to fix the problem yourself, however, toilets do get damaged and broken over time and can cause more severe problems, which would require a professional to diagnose and fix.