The Noritz Tankless Water Heater Error Code 14

If you own a Noritz tankless water heater and see an Error Code 14 on the remote display, STOP and call for service. Do not attempt to repair as a DIY project. The error code warns the user of an overheating condition at the heat exchanger.

The primary (most common) reason for Error Code 14: Scale build-up.

Although I don’t recommend you repair the heat exchanger, removing scale build-up is a job you can perform. However, the heater must have insolation valves installed.

What causes scale build-up? Water quality. Learn more in this short Tech Tip video. And keep scrolling for the video on how to descale your tankless water heater.

How to descale your Noritz water heater.

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