Water heaters often make noise due to sediment build-up, condensation, loose parts, high water pressure, or just the normal functioning of a water heater. Each different type of sound can indicate a different issue. Read this article to learn what the 5 different types of water heater noises mean and how to fix the issues.
1. Banging/Rumbling
The most common sound water heaters make is a banging and/or rumbling sound. This is usually caused by excess sediment build-up, which is from hard water deposits. If you do not have a tankless water heater, flushing and draining the hot water heater tank can fix this. This should be done once or twice a year anyway for optimum water heater performance. You could also try a descaling solution to break down the limestone in the tank.
2. Popping
This is another common sound, and like the banging and rumbling, is caused by excess sediment build-up. Additionally, this sound may also mean that it’s time to replace the water heater’s anode rod. If you live in an area with especially hard water, installing a whole-house water softener machine may help prevent sediment build-up in your water heater.
3. Sizzling/Crackling/Hissing
Electricity-powered water heaters are prone to making sizzling, crackling, and hissing noises. This is a normal sound if it happens only occasionally. If the sound is occurring regularly, there may be something obstructing the water heater’s heating element. If you have a gas-powered water heater, the issue may be moisture build-up. In either case, it is recommended that you call a plumbing professional to get these issues taken care of.
4. Ticking
In many cases, the ticking sound is a normal part of the water heater’s operation. However, if you are hearing a ticking noise continually or often, it may be due to a sudden change in water pressure. You can adjust the water heater’s water pressure level with the pressure-reducing valve. You may also need to install some insulation or straps to your water heater to better hold it in place so it doesn’t move when water pressure changes. Tightening or replacing loose pipes can also help prevent the ticking sound. Also, lowering the temperature by a few degrees may also help prevent the noise so water pipes aren’t expanding and contracting quite so much.
5. Screaming/Screeching/Singing/Whistling
A high-pitched whistling sound coming from your hot water heater can be from loose valves letting air out of the tank, indicating a restriction of water flow. In this case, check your pressure release valve, temperature valves, and inlet/outlet valves. Make sure they are fully open.
Water Heater FAQs
1. Should I be concerned that my water heater is making noise?
Water heaters will make noise and often this is normal. However, this can also indicate a variety of different problems that need attention. If you’ve tried the steps above and still hear noise, contact a professional plumber to have your water heater inspected.
2. What does it sound like when a water heater is going out?
Persistent noises, especially popping, banging, or rumbling, can be a sign that your water heater is about to fail. Water heaters have a lifespan of 8 to 12 years, and how long they last tends to depend on how well the water heater is cared for. If you’re not sure if your hot water heater is dying, call Jerry’s Plumbing, Heating, & Welding to inspect your appliance.
3. What type of water heater should I have?
Tankless water heaters cost more upfront but cost less to install. Tank water heaters cost less to purchase, but can be a bit more costly to install. Also, tankless water heaters are more energy efficient. Tank water heaters are often better choices for people in large houses, although some newer tankless water heaters are now able to serve large homes too.
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