Water heaters are designed to last for many years, and while you should schedule maintenance sessions for yours at least once a year, it shouldn’t develop many problems over the course of its lifetime. That can make it hard to determine when it needs to be replaced. Age factors into it, but well-maintained water heaters can last much longer than their warranty indicated. So when does your water heater need to be replaced? Here’s a quick breakdown of signs that you should look for.