If you go to take a shower and you have nothing but cold water coming out of the showerhead, you may need to call for help. You can try to deal with the problem on your own by doing some troubleshooting. Take the time to see if there is power going to your hot water heater, and look for leaks around the tank. If there is a pilot light on your tank, this can sometimes go out. When you aren't sure what is causing the problem that leaves you without hot water, it's time to call your HVAC contractor to come and fix the problem.
When Water Is Leaking
Sometimes a valve can be leaking which causes your hot water heater to empty out. Without any water inside to heat up, your hot water heater can't deliver you any hot water. If the leak is caused because of corrosion in your tank, you probably need to have your hot water heater replaced. Corrosion is generally not worth the repair, as the tank can corrode in another area soon.
If The Water Isn't Hot Enough
Check the thermostat on your hot water heater. If it's not working properly or someone has turned it down, you may have water that just doesn't get hot enough. Your thermostat may need to be replaced if your water doesn't reach the temperature you set.
Check the Fuel Supply
In months of heavy use, it can be easy to run out of fuel to heat your hot water. If you have an oil tank, check to see if the tank has any oil in it. Sometimes the gauge of the tank can break, making it appear as if you have oil when you don't. If you run out of oil to heat your hot water, get a delivery as soon as possible to fix the problem.
Look at the Reset Button on Your Water Heater
Sometimes the problem on your hot water heater is as simple as a tripped reset button. Hit the reset button to see if this fixes your hot water heater. If your reset button trips consistently, talk with your HVAC contractor about your options.
When you don't have any hot water, it's time to investigate further. Make sure that the circuit breaker hasn't tripped. Look for leaks around your tank. If you can't identify the issue, contact your a hot water heating service to come and fix the issue for you.