The Maynard Man Shares Signs of a Failing Water Heater

Inconsistent or Lukewarm Water

• One of the first signs homeowners notice is a change in water temperature. If your hot water runs out quickly, takes longer to arrive, or never seems to get as warm as it used to, it’s likely your water heater is struggling. These issues can be caused by sediment buildup inside the tank, which creates a barrier between the heating element and the water, reducing efficiency. Alternatively, worn-out heating elements or a failing thermostat could be to blame—especially in electric models. If temperature issues become more frequent or worsen over time, it’s a good indicator that the unit may be nearing the end of its service life.
• Strange Noises from the Tank
• A healthy water heater operates quietly, so if you begin to hear rumbling, banging, or popping noises during a heating cycle, it’s time to investigate. These sounds are typically caused by hardened sediment settling at the bottom of the tank. As the burner heats the trapped water beneath the sediment, steam bubbles form and create noise as they escape through the buildup. Not only are these noises disruptive—they’re a red flag that your water heater is working harder than it should. That added strain reduces efficiency, increases wear on internal components, and can shorten the life of the unit. Ignoring these sounds now could lead to more serious issues later.
• Discolored or Rusty Water
• If you notice brown, reddish, or murky water coming from your hot water taps, it could be more than just pipe residue—it might be your water heater signaling internal corrosion. Over time, the protective anode rod inside the tank deteriorates, allowing rust to develop on the tank walls. Once that rust enters your water supply, it’s a strong indication that the interior of the tank is compromised. In some cases, discolored water may be caused by aging plumbing rather than the water heater itself. A professional inspection can help pinpoint the source. However, if the discoloration consistently comes from hot water taps only, your water heater is the more likely culprit—and it’s probably time to consider a replacement.
• Water Around the Base of the Unit
• Any sign of moisture or pooling water near your water heater deserves immediate attention. While small amounts of condensation might occur occasionally, consistent dampness or visible leaks could mean the tank has developed a crack or that a valve is failing. Even a minor drip can lead to major water damage if left unaddressed. The temperature and pressure relief (T&P) valve may also leak if system pressure becomes too high—another indicator that something isn’t functioning properly. If you see water around the unit, turn off the power supply and call a professional. Catching the leak early can prevent structural damage and costly repairs.
• Rising Energy Bills Without Increased Use
• If your utility bills are climbing but your water usage hasn’t changed, your water heater could be the hidden cause. As systems age or components begin to fail, they often require more energy to maintain the same level of performance. Whether it’s a buildup of sediment, worn heating elements, or inefficient insulation, the result is the same—your water heater has to work harder and run longer. This slow decline in efficiency can happen over months or even years, which is why it’s easy to overlook. But if your energy costs are trending upward without a clear explanation, it’s worth taking a closer look at your water heater’s performance and age.
• The Age of the Water Heater
• Even the most reliable water heaters don’t last forever. Most tank-style models have a lifespan of about 8 to 12 years, while tankless systems may last a bit longer with proper maintenance. If your unit is approaching—or has passed—this age range, it’s more prone to developing issues like leaks, rust, or heating failures. You can usually find the manufacture date on a label near the top of the unit. If it’s over a decade old and starting to show any of the other warning signs we’ve covered, it may be more cost-effective to replace it rather than continue repairing it. Upgrading to a newer, more efficient model can also save you money on your energy bills in the long run.
• Wrap-Up: Don’t Get Left in the Cold—Call the Maynard Man
• A failing water heater doesn’t always stop working overnight—but the warning signs are easy to miss if you’re not paying attention. Spotting the clues early—like temperature fluctuations, rust-colored water, odd noises, or rising energy bills—can help you avoid a complete breakdown and the discomfort that comes with it. The Maynard Man recommends staying ahead of these issues with regular maintenance and timely inspections. Contact Maynard Plumbing, Heating, Cooling to schedule a water heater check-up or to explore high-efficiency replacement options that keep the hot water flowing year-round.