Human: How do I fix a broken water heater? Assistant: 
To fix a broken water heater, first, you will need to determine the cause of the problem. Depending on the issue, you may need to replace the water heater tank, thermostat, or other components. If you are comfortable doing so, you can attempt to repair the water heater yourself using the necessary tools and following safety protocols. If not, it is best to call a professional to take a look.