toilet not refilling after flushing

Sounds like the valve part of the assembly is getting sticky.

Easiest thing to do is just replace the entire fill valve assembly, they can be gotten for around $10 at the box stores.

Jeff

2 possible solutions: take it apart clean, inspect, replace any seals, or buy a new fluid-master install adjust. Both are messy, as after you turn the water off and flush it, and sponge up any remaining water, there still always seems to be some drip from the mounting hole after the old one is removed. just have a catch can and rags handy. This is an ideal time to inspect the feed line and valve. if you have no valve and had to turn off the main water valve to service the toilet, now is the time to add one. If the end on the supply valve isn't compatible with the new valve (assuming you op for the new valve) it would be a good idea to pick one up with the new valve, too long is OK if you don't mind the plumbers loop to take up the excess, sometimes they don't have the exact length as your old one.