Nobody thinks about their water heater until it stops working — usually at the worst possible time. A typical tank water heater lasts 8–12 years, and a tankless unit can go 15–20. But they don't fail overnight. Here are the warning signs that yours is on the way out.
1. Your Water Heater Is Over 10 Years Old
Check the serial number on the manufacturer's label — the first two digits usually indicate the year it was made. If your tank water heater is approaching or past the 10-year mark, it's living on borrowed time. That doesn't mean it'll fail tomorrow, but proactive replacement is almost always cheaper than emergency replacement.
2. Rusty or Discolored Hot Water
If rust-colored water comes out only when you run hot water (not cold), the corrosion is coming from inside the tank. The anode rod — a sacrificial metal rod inside the tank designed to attract corrosion — has likely been consumed. Once the anode rod is gone, the tank itself starts corroding. At this point, replacement is usually more practical than repair.
3. Rumbling or Popping Noises
Sediment builds up at the bottom of the tank over time. When the burner heats water through a layer of sediment, you'll hear rumbling, cracking, or popping sounds. This sediment layer makes the heater work harder (raising your energy bill) and accelerates wear on the tank. Annual flushing prevents this — but if it's been years since the last flush, the damage may already be done.
4. Water Around the Base
Any pooling water around the bottom of your water heater is a serious warning sign. It could be a leaking drain valve (easy fix) or a crack in the tank itself (replacement required). Tank cracks are caused by the metal expanding and contracting over thousands of heating cycles. Don't ignore this — a small leak can become a full rupture and flood your garage or utility closet.
5. Not Enough Hot Water
If your showers are getting shorter because the hot water runs out faster than it used to, the tank's capacity is effectively shrinking. Sediment buildup reduces the usable volume inside the tank, and a failing heating element (on electric units) or burner (on gas units) can't keep up with demand.
What to Do Next
If you're seeing one or more of these signs, don't wait for a catastrophic failure. Schedule a diagnostic — at Kimco, we'll inspect your water heater, give you an honest assessment, and provide a flat-rate quote for replacement if needed. We stock the most common tank and tankless units and can usually do same-day or next-day installation.