A failing water heater rarely breaks down without warning. Knowing the signs can help you avoid a cold shower — or worse, a flooded basement. Here are five red flags NYC homeowners and building managers should watch for.
1. Your Water Heater Is Over 10 Years Old
Most tank water heaters last 8 to 12 years. If yours is approaching that range, it’s time to start planning for a replacement — even if it seems to be working fine. An aging unit runs less efficiently, driving up your energy bills, and is more likely to develop leaks or fail suddenly.
2. Rusty or Discolored Hot Water
If your hot water has a brown or reddish tint, it could mean the tank is corroding from the inside. Once rust starts, it’s only a matter of time before a leak develops. Rusty water can also come from aging pipes, so have a licensed plumber diagnose the source before it becomes a bigger problem.
3. Strange Noises Coming From the Tank
Popping, rumbling, or banging sounds from your water heater usually mean sediment has built up at the bottom of the tank. This sediment hardens over time and forces the unit to work harder, reducing its lifespan and efficiency. While flushing the tank can sometimes help, persistent noise often signals that replacement is the smarter investment.
4. Inconsistent or Lukewarm Water
Running out of hot water faster than usual? Struggling to get the temperature right? A water heater that can’t maintain consistent heat is likely nearing the end of its life. This is especially common in NYC apartments and multi-family buildings where demand is high.
5. Visible Leaks or Moisture Around the Unit
Any pooling water or moisture around the base of your water heater is a serious warning sign. Small leaks can quickly turn into major water damage, particularly in basement installations common across New York City buildings. Don’t wait — call a plumber immediately.
What Should You Do Next?
If you’ve noticed one or more of these signs, it’s time to talk to a professional. At Karl’s Plumbing Heating & Cooling, our licensed master plumbers can assess your water heater and recommend the best replacement option — whether it’s a high-efficiency tank or a tankless water heater that provides endless hot water on demand.
We’ve been serving NYC homeowners and businesses since 1935. Request service online or call us at (800) 721-3200 — we’re available 24/7 for emergencies.
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