Toilet is less then 6 months old. Will not refill with water. Can add water to tank and it will flush, but will not refill. Everything in tank seems to be in place. HELP!!!!!!!

Keep in mind that if you limit the amount of water too much, the 3.5 gallon toilet will not flush properly.

This looks like an old Kohler Rialto toilet. The proper way to adjust the water level is to tighten down on the adjustment screw located on the very top of the fill valve. The fill valve is the the piece that the float ball screws into on the left side of the tank.
Tighten the screw down and flush the toilet. Wait for it to refill, and check the level. If you need less water, tighten again, let fill and check level.
There are also two old school methods to save water in your toilet. One is to put one or two bricks into your toilet tank. This reduces the amount of water that fills the tank. The second method is if the fill valve has a float ball on a metal rod, you can bend this rod down into the water. This makes the fill valve shut sooner. Don't bend too far or too fast because the chlorine in the water weakens the brass rod that the float ball attaches to.

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.

How old? Who installed? Any warranty? I'd follow that route first.
If not warranty I'd try to get the installer to be interested. Perhaps he will have a "red face" an help out.

We had a problem with phantom flushing. Call Kholer. They will send redesigned battery holder and top of flush unit for free. Seems to have fixed the issue.

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.

We have replied that it sounds as if your internal flush kit button is stuck in the down position. If you continue to have problems please contact us for a replacement flush kit for free. Thank you.

There are a few likely causes for a toilet to leak and refill. The most common is the flapper not seating properly. Usualy on an American Standard it is a disc. Either way, they are fairly easy to replace. One test I use to see if the leak is comming from the flush assembly is to put a couple drops of food coloring in the tank and wait a few minutes to see if it appears in the bowl. If so, there is a leak in the flush assembly, usualy the flapper. Hope this heps. Please vote to let me know.

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!

I fixed the problem. There was a clog in the pipes so i just flushe dthe pipes out.
thanks,
for your help