Error Code 11

EC11 or Error Code 11

An 11 error code is an ignition failure. In other words, the unit recognizes there is a demand for hot water but for some reason is not able to ignite. This usually means there is no spark or insufficient gas entering the burner for ignition. In some cases the 11 error code could also occur when when the unit ignites but fails to detect ignition via the flame rod.

The first step in troubleshooting is using the small sight glass built into the burner to observe if the burner is actually failing to ignite or failing to detect ignition.

 1) insufficient gas supply
 2) insufficient air flow
 3) debris on the ignition plug

 It is recommended that you contact a servicer to troubleshoot this error code

Please visit http://support.noritz.com/servicereplocator.php

Updated on April 12, 2021

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