Since moving to New York I have never had any issues with my hot water supply. For about two weeks I have had limited hot water, how do I know if the hot water heater is broken? Who do I call to check or fix the hot water heater?
The easiest way to know when your hot water heater is down is by testing the temperature of the water at the faucet. If it's cold, the water heater needs repair.
You know it by touching and feeling the pipes on the hot water side; if they are hot, there is water running through the pipes and obviously the heater valve is open on hot side.
The thermostat is broken. If it's not heating at all the heater element and/or it's fuse is broken.
Probably the hot water heater is off, either it has broken down or the pilot light has goen out.
It is a water heater, not a hot water heater. There would be little point in using a hot water heater. I assume that is your point.
If it leaks or no longer provides enough hot water
form_title= Tankless Hot Water Heater form_header= Save money with a tankless hot water heater. Do you need to remove an old water heater?*= () Yes () No Do you want an energy efficient water heater?*= () Yes () No Where will you be installing the hot water heater?*= _ 
THERE IS NO SUCH THING AS A HOT WATER HEATER.
low water, bad thermostat, vacuum door not working, clogged up heater core, heater valve broken........
If a pipe is broken your hot water pressure will be lower and you will see damp walls somewhere. - If an element or switch in the H/W tank is broken or faulty, you will not get much hot water.
It's called water heater. There isn't a reason to heat hot water
There is normally not a pump on a water heater. The water is moved through normal water pressure. If you are having problems with getting hot water through, it may be that the pipes are corroding or pinched, slowing the flow. Or the hot water heater itself is leaking.
The term "water heater" is non-specific, but may imply a domestic hot-water heater, when read in context. A "hot-water heater" is specifically meant for heating water for domestic use. A hydronic boiler is also a water heater, but the water is only used for heating the radiators or for heating a hot-water heater, but the hot water of the boiler is not released for domestic use.Depends as there is a water heater and then a booster which increases the temperature for mostly commerical applicatons thus your heating the hot water to a higher temperature and some call this a hot water heater instead of a temperature booster
You may have a restriction in your hot water heater exit pipes. There may be corrosion. How old is the house and how old is the hot water heater? What type of pipe is there going out of the hot water heater? You need to know this to fix the problem yourself without hiring a plumber.
They don't have bladders in them
YES!!!!YES you can. It has nothing to do with the hot water, unless you have a gas dryer and you have shut off the gas.
It is just a water heater. People just say hot water heater without thinking.
new boiler and hot water heater
Hot water in homes is produced by a device called a water heater. A water heater can be compared to a pot of boiling water. The enclosure keeps water hot throughout the day so that when the faucet is turned on, there will be an immediate flow of hot water. The people who have hot water have invested in a water heater.
form_title= Electric Hot Water Heater form_header= Install an electric hot water heater. Is your current water heater electric?*= () Yes () No How old is your home?*= _  What is your current monthly electric bill?*= _ 
if its not a forced air water heater then yes its should be hot but not red hot.
It's because "hot-water" is a compound adjective, modifying "heater". It's not for heating water, it's for heating a house with hot water. There are many types of heaters that heat water, but only a hot-water heater is used for providing heated water for domestic use. A hydronic boiler also heats water, but it's only for use in radiators.The name "Hot Water Heater" is completely wrong for any use. There is no need to heat hot water. IT has always been "water heater". The term hot water heater has just been used for years because people don't realize the difference. It has always been WATER HEATER.The first answer is jibberish and makes no practical sense at all.
If the tub is not getting hot water the issue is probably with the hot water heater. The hot water heater may have tripped a breaker or the pilot light went out.