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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
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”Technician Scott made sure all was ok before he left. Always satisfied with Arctic and Scott’s service”

- Gary Stahl
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”It is a pleasure dealing with Arctic Air Conditioning. They are professional, communicate and show up when they say they will. The technician was knowledgeable and thorough. He explained the…”

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”We have used Arctic Air since 2017 when we installed a new HVAC system. Today we had Alex Demauro come out for our yearly fall maintenance. After a not so…”

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”The technician was very professional. He answered all of our questions regarding the air purification system”

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”Highly recommend! Alex D who came and serviced our heat was great and very professional.”

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”Excellent people to rely upon. For many years I have been getting their services with full satisfaction. I recommend Arctic Air over any bigger company around Central Jersey”

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”Yet another great experience with these guys! The lady on the phone to Greg coming in and fixing my heat explaining everything ! Thanks !!”

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”I delt with Allison in the office and Eric Reed was my technician two very highly professional people extremely helpful and solved my ongoing problem Iwill always recommend Artic air…”

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”Very thorough and reasonably priced.”

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”Frank was an excellent mechanic. Knew his stuff and respected my home. He installed what was in the provided kits. This unit was installed by Artic and I expected them…”

- Michael Stuart
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”Alex was great. Highly recommend them for both air conditioning and heating.”

- Jacqui Melman
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”They replaced both our heater, filter and ac unit. These guys were great. Very polite and got the job done without issues. The work they did was clean and organized.…”

- Brian Appleby
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”Great job cleaning an older HVAC system. On time, fast, efficient and charged reasonable fee.”

- Russell Einbinder
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”They replaced both our heater, filter and ac unit. They showed up on time in masks and gloves, and got right to work. These guys were great. Very polite and…”

- Brian A.
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”Excellent service and price”

- Marconi Cap
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”Professional and with very friendly staff all around from the scheduling people in the office, to the sales associates, to the technicians.”

- Jaclyn Spoleti
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”We were extremely satisfied with the spring air conditioning tune up provided to us by Frank Santarpia of Artic Air. He went above and and beyond to answer any questions…”

- Gail Cohen
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”My reason for contacting Artic Air was to assist in my HVAC inspection for my CCO Application. I felt from my initial contact to inspection it was a seamless and…”

- Jamie Lynne
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”During the maintenance, they found that my upstairs valve was not working... They fixed it. Job well done.”

- Shaati Chattopadhyay
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