Getting ready to hop in the shower only to find that there is no hot water can be frustrating. Instead of immediately calling a plumber, first, check a few things to try and fix the problem yourself. Make sure the breaker hasn't tripped Check for leaks around the water heater Ensure all valves are open to the bathroom, fixtures, and water heater Check the pilot light Make sure the gas bill got paid! For problems like a breaker tripping or a pilot light going out, they can be easily fixed. Though, if they continue to happen you should call a plumber to check them out.