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What Those Weird Water Heater Noises Mean

You probably don’t think about your water heater much—unless it starts making a racket from behind the utility closet door. If you hear this appliance calling out for attention, don’t ignore it. Diagnose the noisy water heater and have it repaired to restore normal operation.

Why is my water heater making a noise? A fair question many homeowners ask! Here’s a quick guide to water heater sounds you may be hearing and what they mean:

Popping, Cracking, or Clanking

If you hear any of these noises while your gas- or oil-fired water heater is operating, mineral deposits may have accumulated at the bottom of the tank. What causes this accumulation?

 

  • Mineral deposits build up naturally as calcium and magnesium carbonate precipitate out of the heated water.
  • Over the years, lack of maintenance can lead to a thick layer of mineral buildup.

This accumulation can block heat transfer and lower water heater efficiency. Mineral deposits can even shorten the lifespan of your unit. Fortunately, the tank clues you in on its need for maintenance by making popping, cracking, or clanking sounds.

Hissing

Electric water heaters are less common these days, but if your tank is powered by electricity, you might hear a hissing sound when the heating electrodes turn on. This also indicates mineral buildup inside the water heater.

Banging or Booming at Start-Up

Before you read any further, turn off your gas- or oil-fired water heater and call a professional for repair services if you hear the tank making a loud bang or boom at start-up. This sound could indicate a dangerous situation where gas or oil is reigniting when the burner starts. The chance of a gas or oil burner puffback explosion puts your family and home at risk.

In less dangerous situations, the banging or booming sound may simply mean your water heater is experiencing higher-than-normal thermal expansion. When this is the cause, you’re most likely to hear a bang or boom when the water is reheating after you used up all the hot water or after the water heater has been turned off for a while. It may require the addition of an expansion tank to make the noise go away.

Water Heater Repair in Central Jersey

The bottom line is if you hear weird water heater noises, it’s best to turn it off and have it looked at by a professional before running hot water again. From improving efficiency to preventing an explosion, having your noisy water heater serviced is sure to benefit you! To schedule water heater repair in your New Jersey home, contact Arctic Air Conditioning today.

Testimonials
5 Rating |

”The repair person was clean, polite, safe and thorough. My air-conditioning is working again. Thank you”

- Sharon Solar
5 Rating |

”wonderful service! professional and nice.”

- Joanne Moliterni
5 Rating |

”Fred was amazing. Very professional! The entire team at Artic Air is incredible!!”

- Daniel Depaolo
5 Rating |

”Joe was aces! He diagnosed my problem quickly and hopefully I’ll be back up and running soon!”

- Michael Brusca
5 Rating |

”Alex was professional and explained everything to me, I really appreciated that he put plastic coverings over his his boots and wOre his mask. They texted me when they were…”

- Sherri Lane
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”Our technician Jesse was thoroughly professional and courteous while, all the while, maintaining social distancing. He quickly diagnosed the issue and completed the needed service is short order. I rate…”

- Larry Folvik
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”Arctic was very friendly, professional, and prompt. I received emails and texts confirming the appointment multiple times, and the tech who was on time and very nice. Would highly recommend.”

- Robert Radliff
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”Alex was awesome and very knowledgeable His professionalism is outstanding We hope to see him in the Fall for our Heating assessment thank you Patti Boniello”

- Patricia Decker-Boniello
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”Arctic Air came to the rescue when another local vendor, Artem HVAC, did not show up for their scheduled appointment after waiting all day. Finally at 7pm , after not…”

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”great job unclogging a blocked AC drain , fixed the leak and system is running nice and cool!”

- Risa Weiss
5 Rating |

”Very happy with the service and the tec hnician.”

- Susan B
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”Moving to another town, we were happy to learn Arctic Air also covers this geographic region. We asked for an A/C system check on a system which we believe the…”

- Steven Myers
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