Hot water heaters can be subject to a variety of problems, ranging from minor issues, such as a pilot light going out, to major problems that require professional repairs. Some of the most common problems with hot water heaters include leaks, inadequate hot water, and strange noises. Leaks can occur around the tank or in the pipes, and they can be caused by a variety of factors, such as corrosion or loose fittings. Inadequate hot water can be caused by a faulty heating element or thermostat. And strange noises can be caused by sediment buildup in the tank. While most hot water heater problems can be fixed relatively easily, it's important to address them promptly to avoid more serious damage.