Hearing Strange Water Heater Noises? Here’s What They Mean

It is perfectly normal for your water heater to make some noise when in use. It’s a machine, after all, and moving components are sure to vibrate. However, what should not be viewed as normal are odd noises that could indicate a bigger problem.

What is your water heater telling you? Our experts at Optimal Plumbing Solutions have years of experience providing water heater repair in Clayton, NC, and we’re more than happy to interpret what your appliance is saying.

Popping Sounds

If your water heater sounds like it’s boiling gravel, you’re probably dealing with sediment buildup. Over time, minerals in hard water settle at the bottom of the tank and harden.

This can slow things down and cause damage. Sediment buildup can be avoided by performing regular water heater maintenance, including flushing the tank and checking if the anode rod needs to be replaced.

Humming

A low humming sound might seem harmless, but it often points to a loose heating element vibrating inside the tank. Left unchecked, this can lead to uneven heating—or worse, a full breakdown.

You should have a professional inspect your water heater to make sure the heating element is properly connected and secured.

Hissing Sounds

These could indicate a leak in the water heater, which should be addressed immediately. Check the appliance for signs of corrosion or damage, and call a professional plumber if you suspect a leak.

Whistling

Whistling noises commonly have something to do with the pressure relief valve. This valve helps regulate the pressure in your hot water tank, and it may need to be adjusted or replaced if you’re hearing a whistling sound. This must be taken care of as soon as possible to avoid further damage to your water heater.

If you hear any of these sounds from your water heater, Optimal Plumbing Solutions can help you understand them better and address potential issues with your appliance. Whether you need simple repairs or complete water heater replacement, we are the local team you can trust.