Question about Global Industrial Navien Np-240a-Ng, Tankless Condensing Natural Gas Water Heater
Often PC boards are damaged by power fluctuations, or when a unit is plugged in with an extension cord. Extension cords cause a voltage drop. When the voltage drops, the amperage (heat) increases and damages the PCB. It could also be from the original install. If the gas line is too small or there is not enough combustion (make up) air, the machine will keep trying to adjust but does not understand why the unit is not working well. Then it displays an error code. It is always important to check the combustion and heater settings. Combustion is nearly never adjusted by contractors. And gas companies make mistakes too.
Posted on Oct 18, 2013
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Posted on Jan 02, 2017
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