Hot Water Heater Makes Noise. Post a question or comment about water catalog of causes & cures of noises heard at or in water heaters, calorifiers, cylinders: When this occurs, it causes a popping sound.
If your water heater is making noises it could be the result of your household plumbing.
Some water heaters make humming noises. Gas tankless hot water heaters all make noise when firing up and heating water, but the levels are usually less than 90 decibels. At first it made a rapid click right after turning off the water. 1) we turned the temperature up from vacation mode for the first time (we live in tucson.
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