Dispenser Makes Rumbling or Gurgling Sound

If your hot water tank makes a rumbling or gurgling sound, find out how to adjust the temperature.

Written Directions

Before attempting to repair your dispenser, read and understand the entire InSinkErator safety and installation instructions listed below.

Materials Needed




  • Rumbling/gurgling is normal and will happen every 15 minutes. It is the sound of the water heating to the set temperature.

1. If the water temperature in your tank is set too high, it may make a louder rumbling or gurgling noise when heating the water. To adjust the thermostat, look at the tank using a flashlight, if needed.

Locate the thermostat dial on the front of the tank and turn it 1/2 a notch counterclockwise to decrease the temperature.

2. Empty hot water from the tank.

Depress or twist the dispenser handle for 20 seconds to allow cold water to enter the tank. Allow the water to reheat to the new setting.

3. Continue adjusting the temperature to your liking.

Continue adjusting the dial in small increments until the temperature is to your liking.

Still Not Working?

If after following our troubleshooting solutions, your tank is still excessively rumbling or gurgling, it may need service. If the problem with your hot water dispenser is due to a quality issue, InSinkErator ma​y pay to have an authorized service center service the hot water dispenser in your home at no charge to you.

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