70 West Plumbing · Homeowner guide
Water Heater Making a New Noise? Listen for the Pattern
The timing and other symptoms matter more than naming the sound perfectly.
A heater that clicks softly while it heats is different from a new rumble, whistle or repeated bang. Every heater sounds a little different, so no recording or description can pin down the cause on its own. Start by noticing when the noise happens, whether it’s changing, and whether your hot water or the area around the unit has changed too.
The sound
Start with what is new for this heater
Water heaters cycle on and off, and some light operating sounds can be normal. A short click while heating is not the same as a loud sound that started this week and now happens every time you use hot water. Compare the noise with this unit’s usual behavior rather than an online recording of a different model.
Write down whether you hear it while hot water is running, while the heater is heating, right after a faucet closes or even when no one is using hot water. A bang after a tap closes may come from water moving through your pipes, not a problem inside the heater. That’s worth checking, but you can’t diagnose it by ear.
Storage tanks
Rumbling can raise a storage-tank maintenance question
In a storage-tank heater, minerals can settle at the bottom over time. Heating around that buildup can be associated with popping or rumbling. Rheem and Lennox both describe this, but not every rumble means sediment. A plumber can look at the model, service history and actual condition before recommending maintenance.
Don’t assume a flush will fix every noise. The right care and timing depend on your heater. If the unit is tankless, its maintenance is different; our tankless maintenance guide covers model-based care questions.
Other signs
A noise plus water or weak heating changes things
Mention any hissing, sizzling, high-pitched noise that won’t stop, or repeated loud banging, along with exactly when and where you heard it. Visible water, a new drip, less hot water or an error message matter too. The sound could come from the heater, a valve or nearby pipes, and it takes a plumber to sort that out.
Stay away from wet electrical areas, and don’t open heater covers or touch gas or electrical controls to investigate. If you smell gas or see another immediate hazard, get emergency help.
Useful details
A 20-second description is all you need to start
When you contact 70 West water heater service, give the sound in your own words, when it starts and stops, when it first appeared, and whether it has grown louder. Add any water, temperature or display changes. If you know whether the unit is storage tank or tankless, include that too.
Ask what the plumber found and why that maintenance or repair step makes sense. A good explanation ties the work to the heater’s condition, not simply to an online sound label.
Need a plumber?
Ask 70 West about your water heater
70 West Plumbing serves Hot Springs, Glenwood, Bismarck and Bonnerdale. Call 501-547-0518, 6AM to 6PM daily, and tell us what’s going on.