Your hot water heater may be burned out, or it may need a new element, or it may need to have the reset button pushed, or it may be out of water. Try hitting the reset button and give it time to warm up. If the water lasts just a short time, then it's probably an element. If there is no water in it, then none will come out, so you got to find why it is empty. Also, check the fuse. If you can't get any hot water, then, you may need to replace the heater.
