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What might cause a rumbling sound coming from the water heater?

April 26, 2017cause coming rumbling sound

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What might cause a rumbling sound coming from the water heater?

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Rumbling sounds coming from a water heater are an indication that sediment has built up on the bottom of the water heater. What you are hearing is water that is trapped in the sediment and is boiling. This is an indication that the water heater is not operating efficiently. Sediment will not allow the heat to transfer to the water in the tank, which sends the heat up the flue.