A household heating system may not do much work over a winter in Southern California, and that’s how most of us like it! But there is a heating system in your house that does an immense amount of labor in winter—as well a spring, summer, and fall. It’s your water heater, and it runs almost every day of the year to keep your household supplied with the hot water necessary for so many basic tasks.
All that work means a water heater eventually runs down and reaches a point where all the best repairs won’t do much but drain money while the water heater becomes less efficient and effective. By all means, have your water heater repaired if those repairs are worth it. But be ready to accept when the better investment is to purchase a new water heater.