Does your water heater make noise when heating? It’s not unusual for your water heater to make a little noise during normal operation, but if you’re hearing unusual sounds or persistent noises, it might be a sign of underlying problems. Many times, there’s an easy fix. But if you wait to address it, it can lead to costly repairs and even serious safety issues.
Worried about strange water heater noises? This guide will help you identify the problem and find a solution.
Popping or Knocking
Why does my water heater make a banging sound? Typically, this occurs when there’s sediment buildup. As water heats, minerals can settle near the bottom of the tank and trap steam bubbles. That popping or knocking sound happens when the bubbles burst. You may also be hearing your hot water heater clicking on and off.
How to fix popping noises in the water heater: Flush the water heater annually to remove sediment.
Hissing or Crackling
Hissing or crackling is another warning sign. For electric heaters, this is typically caused by sediment buildup on the heating element.
If you hear hissing coming from a gas heater, it could be condensation hitting the burner, but it could also indicate a potential gas leak, which can be extremely serious. Shut off the gas immediately and call for help, especially if you smell rotten egg odor.
Solutions for hissing or crackling sounds: Drain the tank to remove obstructions or call a technician if moisture buildup is detected.
Banging (Water Hammer)
That “water hammer” sound comes from high pressure in the system that forces the water to change directions abruptly.
How to stop the banging: Install a water hammer arrestor or adjust the system pressure.
Screeching or Whistling
That high-pitched whine is typically caused by a loose or partially closed inlet control valve that restricts the natural flow of water. Does your hot water tank sound like a kettle? It needs some TLC.
Solution for screeching or whistling: Fully open the valves or contact a professional for repairs.
Humming
There are several reasons you might be hearing a humming sound, but the most common is from vibrations from a loose heating element.
Stopping the humming: Tighten the heating element to eliminate vibrations.
When to Call a Professional
If you’re hearing any of the noises mentioned above, especially if they are persistent or worsening, it’s time to call in the pros to fix any problems and ensure the safety mechanisms to prevent explosion are working properly.
Visible signs of damage, such as leaks or rust/corrosion around the tank, are also signs your water heater may be failing and need repair or replacement.
Preventive Measures
Taking a few precautions can make a big difference and extend the life of your water heater.
- Scheduling regular maintenance, including annual tank flushing, to prevent sediment buildup
- Replacing the anode rod as needed to reduce rust and mineral deposits
- Checking and tightening components periodically to ensure proper function
This is best left to the pros to avoid safety issues and ensure there aren’t bigger problems on the horizon.
The Bottom Line
Is a noisy water heater dangerous? It can be. If you’re hearing these sounds, your water heater is telling you something’s wrong. Don’t let strange sounds turn into bigger problems! Contact Payless Water Heaters at (888) 548-5632 for expert repair, maintenance or replacement services. Our specialists can ensure your water heater operates efficiently and safely!
