On the covered Noritz tankless water heater, 14, EC14 means a significant overheat of the heat exchanger tripped the thermal fuse and shut the unit down. Noritz says the thermal fuse is a one-time part that is physically broken once it trips. First, do not attempt to reset or bypass it.
Try in this order
0 of 2 completedWhat to do first
ReversibleDo not attempt to reset or bypass it.
Correct only the documented fault domain
ReversibleNoritz warns never to bypass the thermal fuse. An EC14 cannot be reset: the fuse must be replaced, which means removing the heat exchanger and takes 2 to 4 hours, and Noritz says it is highly recommended to replace the heat exchanger at the same time, because the same scale will cause the code again. The most common cause is scale in the heat exchanger from hard water and no treatment or descaling. Noritz advises a water softener or Scale Shield in hard-water areas.
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What does 14, EC14 mean on a Noritz tankless water heater?+
A significant overheat of the heat exchanger tripped the thermal fuse and shut the unit down. Noritz says the thermal fuse is a one-time part that is physically broken once it trips.