Question about Noritz 6.9 Gallon Residential Direct Vent Tankless Water Heater - N
The 16 error code occurs when the outlet temperature exceeds the set temperature of the unit. Typically this occurs when the unit has developed scale in the heat exchanger. I would initially recommend performing a descale on the unit to remove any scale deposits from the HEX.
Posted on Sep 01, 2010
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Posted on Jan 02, 2017
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