Toilet tank will not refill with water after flushing

Take off the cover and look at the mechanism when you flush. It's possible the set screw that keeps the flush rod in place has just loosened. If not then the easiest way to deal with this is to replace the Toilet Refill Valve. Turn the water line at the base of the toilet to off. Flush until most of the water is out of the tank, the go to Home Depot and buy this:

Fluidmaster Toilet Tank Fill Valve 200AX The Home Depot

Unscrew the old one and screw in the new one.

That's an interesting one! Does the flush valve close properly so the tank can refill? Does the float valve allow the tank to refill fully, to near the top of the overflow? That can be adjusted, if it doesn't.

Check fhe flush valve - you may have an obstruction under it. Also check the water port from the bowl side - feel up inside the port for obstructions or buildup of hard water deposits.

WASH YOUR HANDS THOROUGHLY afterwards.

Just replace the whole assembly. It only costs 12-15 dollars. Water contains so many minerals that just clog up lines like cholesterol. Just be done with it. It is not worth the effort to try to clean all that out . Plastic is sometimes not very forgiving.

My sister has a two year old Jacuzzi toilet that worked fine until a few months ago. Then it started to take 10 minutes to shut off after each flush. I lifted the tank cover and immediately saw the problem; at least 90% of the refill water was going into the refill pipe instead of the tank. Upon examination I discovered that the plastic part that holds the flexible refill tube to the vertical refill pipe was broken. This part not only holds the refill tube in place, it also has a small orifice at the end to restrict the flow into the pipe. The part was broken in such a way as to let nearly all the water go into the refill pipe instead of the tank, hence it would run for 10 minutes after the toilet bowl was full and waste all that water. I found a small coarse thread stainless steel screw that fit into the plastic attachment piece to help plug the orifice and cut down the amount of water going to the refill pipe. Now the toilet flushes and refills in less than 2 minutes. I'm in the process of trying to find a replacement for that part but so far no luck.

The overflow pipe should be attached to a small clip that holds it in position over the over flow pipe. If it is loose or attached to the outside it will do what yours is doing.

flush valve has obstruction and tank is not filling all the way to just below overflow tube.

Sounds like your toilet is not vented properly. Possilbly something caught in the trap is causing it to syphon

Lift the tank lid off, place it somewhere safe for a moment, and look at what happens: If you're talking about jiggling the handle to get the tank to start to fill with water, then it sounds like the chain or rope is out of adjustment. It can't be TOO TIGHT or the water will leak past your flapper (will cause your dripping noise, tank water level will leak down, causing constant refills), and it cant be TOO LOOSE or the toilet won't flush correctly. Since you didn't mention trouble flushing the toilet, I think that it may be a little too TIGHT. When you jiggle the flush lever-it is supposed to pull a chain or cable to open the flapper at the bottom of the tank. Flush the tank and watch what happens-all the way through to refilling the tank with water and shutting off the water refill valve-Does the flapper get stuck on the chain or something? It is supposed to fall back down to allow the tank to refill after flushing out your toilet. Does the chain look very loose? The dripping sound you described indicates that the flapper is not sealing 100%. The flapper is very easy to replace, you just have to get the adjustment set for when you flush the toilet how sensitive you need it. You amy have to play with it a little bit before you get the adjustment correct.

Hope this helps!

yeah sounds as though the ball valve or water inlet valve is stuck in the closed position or jammed so when you flush the loo the water doesnt refill.
Isolate water service remove valve as required clean/replace re instate test & leave working

okay depending on the type of toilet ball **** (i know its a funny word, but it's really what its called.) you have one the most standard type is the long wire with the big ball on the end. you need to adjust this ball **** so it goes lower test it out, flush your toilett and wait till the water drains then when its supposed to come back up push down on the ball **** and youll see the water will start to fill, so then adjust the little screw on the fill valve (the other side of the floater where its attached)

you may need to shut off your water supply and drain your tank depending on how skilled you are,

pretty simple work, if you have questions feel free to ask.