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: What a great bulletin board you have. It is nice of you to share your knowledge.: Here is my problem.: My hot water heater makes loud banging noises when heating the water. : What could cause this? : The heater (Montgoery Wards) is about 7 years old.: Thanks, : JoeHi, Joe!!!Noise in heaters is almost universally from calcium carbonate deposits from somewhat hard water (which every state has). It wont do much but scare you. Except it will cost a little more to heat thru the extra thickness of deposit. If the deposits tend to fall to the bottom, merely draining frequently ( once a year, min.) will get rid of most of the deposits. Good Luck!!!