A broken water heater isn’t just inconvenient—it can be dangerous. While water heater explosions are rare, when they happen, they can cause significant water damage and pose serious safety risks. Understanding the warning signs of a failing water heater isn’t just a skill; for homeowners, property managers, and DIY enthusiasts, it’s a necessity.
This blog will help you identify the warning signals of a water heater at risk of exploding, explain what they mean, and outline essential steps to protect your property and loved ones.

Why Water Heater Maintenance Matters
When was the last time you thought about your water heater? Like most major appliances, it probably sits quietly in the background, doing its job without much attention—until something goes wrong. Ignoring water heater maintenance can lead to costly repairs or even dangerous situations, including explosions caused by pressure buildup, faulty components, or other issues.
Don’t wait for disaster to strike. Regular maintenance can save you time and money while ensuring your home’s safety and comfort.
Common Signs of Water Heater Failure (and a Potential Explosion)
Recognizing the warning signs of a failing water heater can prevent accidents and reduce unnecessary stress. Below are some red flags that your water heater might be in trouble:
- Unusual Noises
- Leaks Around the Tank
- Rusty or Discolored Water
- Water Temperature Issues
- Age of the Water Heater
- Visible Corrosion
- Faulty Pressure Relief Valve
Each of these signs can indicate problems that require immediate attention.
1. Unusual Noises
Is your water heater making popping, hissing, or banging sounds? These noises could signal excessive sediment buildup in the tank. Over time, sediment hardens, reducing efficiency and increasing pressure inside the tank. If left unchecked, this pressure could lead to dangerous cracks or, in extreme cases, an explosion.
What to Do: Schedule a maintenance appointment to flush the tank and remove sediment buildup. Professional maintenance ensures safe and effective cleaning.
2. Leaks Around the Tank
Water pooling near the base of your water heater is never a good sign. Leaks can indicate that the tank is cracked or that a component is damaged, which compromises the heater’s structural integrity.
What to Do: Turn off the water supply and power immediately, and call a plumber to assess the situation.
3. Rusty or Discolored Water
Rusty water flowing from your faucets may indicate that the inside of your water heater is rusting. Rust weakens the tank walls, making it more susceptible to leaking or bursting under pressure.
What to Do: If you notice rust or sediment coming from your taps, it’s time to replace your water heater. Consider consulting an expert to confirm the problem.
4. Water Temperature Issues
If your water goes from scalding to lukewarm without warning, it may be more than a simple annoyance. Fluctuating water temperatures often point to problems with the thermostat, the heating element, or excessive pressure within the tank.
What to Do: While some temperature issues might be solved with adjustments, recurring problems should be assessed by a professional.
5. Age of the Water Heater
Most water heaters last between 8 and 12 years. If yours is over a decade old, it may be running on borrowed time. Older water heaters are more prone to leaks, pressure buildup, and other dangerous failures.
What to Do: If your unit is aging, consider replacing it with a modern, energy-efficient model.
6. Visible Corrosion
Corrosion on your heater’s body, fittings, or valves indicates wear and tear that could lead to leaks or structural weaknesses.
What to Do: Regular inspections can help catch corrosion early. Severe corrosion may require immediate replacement.
7. Faulty Pressure Relief Valve
The pressure relief valve is a critical safety feature that prevents excess pressure from building up inside the tank. If this valve fails, the resulting pressure could turn your heater into a ticking time bomb.
What to Do: Test your pressure relief valve once a year, or ask a professional to ensure it’s functioning correctly.
What to Do If You Notice These Signs
Spotting these warning signs early can save you from expensive repairs or potentially dangerous situations. If you notice any of the above symptoms:
- Turn Off Power and Water Supply: Immediately shut off the water heater’s power source (electricity or gas) and water supply to prevent further damage.
- Call a Professional Plumber: A licensed plumber can evaluate the issue, repair the damage, or recommend a replacement if necessary.
- Avoid DIY Solutions for Major Problems: Attempting to fix a faulty heater without the right tools or expertise can be dangerous. Leave complex repairs to the experts.
Extreme Plumbing and Rooter offers emergency plumbing services 24/7. With over 25 years of trusted service , we’re your go-to experts for water heater repairs and replacements. Call us anytime!
Long-term Prevention Strategies
Prevention is always better than cure. Here are simple strategies to maintain your water heater and enhance its safety:
- Schedule Regular Maintenance: Flush your water heater annually to remove sediment buildup and prolong its lifespan.
- Install a Water Softener: Hard water accelerates sediment buildup. A water softener minimizes this issue, helping your water heater run smoothly.
- Test the Pressure Relief Valve: Ensure the pressure relief valve is working properly to prevent dangerous pressure buildups.
- Follow a Replacement Schedule: Don’t wait for your heater to fail. Replace your unit once it approaches the end of its lifespan.
When Tragedy Strikes—Real-Life Examples
Consider this sobering tale from a family who neglected their aging water heater until it exploded. The resulting damage? Flooded floors, structural repairs, and insurance challenges that could have been avoided with regular maintenance.
Don’t take chances with your safety or property.
Keep Your Home Safe Today
A poorly maintained water heater can lead to costly repairs and dangerous accidents, but these risks are avoidable. By recognizing the signs of water heater failure, taking immediate action, and scheduling regular maintenance, you can enjoy reliable hot water and peace of mind.
Not sure where to start? Call Professional Plumbing Services today for a professional water heater inspection or maintenance service. Based in La Crescenta and Surrounding Areas, and serving the greater area 24/7, our expert team is here to keep your home safe.
Contact us now for an inspection and prevent a disaster before it starts.