Decoding Water Heater Noises

Plumber fixing water heater in bathroom

When your water heater makes strange sounds, it’s trying to tell you something. It can generate various noises, and it pays to know what they mean. That way, you can contact A.M. Plumbing & Rooter for a prompt water heater repair in Fallbrook, CA, when necessary.

Below, we decode the common noises you can hear from your water heater.

Rumbling or Banging

Rumbling or banging sounds are often due to accumulated sediment in the tank, which can react with the heating element. You can fix this issue by flushing the hot water heater tank at least once or twice a year. It’s essential to address this problem as soon as possible as it can impair your heater’s efficiency and cause pinhole leaks when left neglected.


Crackling noises are more common in an electrical traditional or tankless water heater. These are normal sounds that may occur now and then. However, if it persists, something might be blocking the heating elements. Meanwhile, if you have an oil or gas-powered unit, moisture buildup may be causing the crackling sound. Have a professional come over and inspect your water heater.


A whistling or screeching sound usually results from loose valves causing air to escape your tank. In this case, see if the temperature and pressure release valves, as well as the inlet and outlet valves, are properly adjusted. If you’re unsure how to do so, enlist water heater services.


Sizzling noises are a serious cause of concern as they often indicate a leak. They happen when leaking water drips onto the burner. You may also notice that you run out of hot water quickly, and there’s water pooling around your water heater. Depending on the severity of the problem, your technician might recommend a new water heater installation.

Once you notice these odd sounds from your water heater, turn to A.M. Plumbing & Rooter immediately. We will perform the required repairs and restore your unit to excellent condition. Contact us today to schedule an appointment.

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