Before calling us for a repair, you can check a few things: Too little hot water is often the result of an incorrect thermostat setting. No hot water can be due to a blown pilot light if you have a gas heater or a faulty element if you have an electric heater. Unpleasant odors coming from your hot water may indicate bacterial growth inside the tank Strange noises coming from your water heater are typically a sign of sediment build-up in the tank