The answer to 'my water heater keeps shutting off' is that there are several common causes, including a faulty thermostat, sediment buildup, or a malfunctioning heating element. This can cause the water heater to shut off unexpectedly, leaving you without hot water.
Some common symptoms include the water heater cycling on and off frequently, the water not getting hot enough, or the pilot light repeatedly going out. Solutions may involve adjusting the thermostat, flushing the tank to remove sediment, or replacing a broken heating element. However, it's important to determine the exact cause before attempting any repairs, as some issues may require the help of a professional HVAC technician.