Question about Rinnai Digital Remote Water Heater Control Mcc-45-4us
I suspect that what you are hearing is a gas buildup, which is igniting. If the funnel and associated flue pipe is solid, this is the only source of the noise that you describe.
Given the nature of my suspicions, you would be best to contact tech. support as soon as possible, and discontinue use of the water heater until it is checked out professionally.
Posted on Sep 11, 2010
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Posted on Jan 02, 2017
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