What do the error codes on a Noritz water heater mean?
The 10, 59, 90 and 99 error codes indicate that a Noritz heater has experienced a combustion abnormality. In most cases, it is the result of an obstruction in the heater’s flue.
What to do when you get a Noritz error code 11?
Action: If the water heating system has the recirculation, try to keep the temperature with the difference of 10 degrees. If the combustion continues, check if there is any foreign body, such as oil/grease on the burner. To reset the code, turn the unit off and on. Problem: The error code 11 is related to ignition failure.
What does the Noritz error code 29 mean?
Noritz Error Code 29 This code indicates a problem with condensate drainage. In condensing tankless water heaters, a special drain line equipped with a neutralizer (to reduce the acidity of the outflow) removes the condensate.
Why do I get a Noritz error code F76?
Unplug the heater for 30 seconds and then plug it back in. If the error code persists, call a licensed contractor. Noritz Error Code F76. This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more than one remote is hooked up to handle two Quick-Connected units.
Why is my Noritz water heater error code 10?
Noritz error code 10 is a sign of a problem with the combustions of the unit. An error code 10 will show up if the output is uneven or the combustion doesn’t stop after the unit has been powered off. Error code 10 can be caused by blockage or scale build-up on the burner.
Action: If the water heating system has the recirculation, try to keep the temperature with the difference of 10 degrees. If the combustion continues, check if there is any foreign body, such as oil/grease on the burner. To reset the code, turn the unit off and on. Problem: The error code 11 is related to ignition failure.
What does the Noritz error code 20 mean?
Noritz error code 20 means the high limit switch has been triggered. To fix the Noritz error code 20, you need to descale your tankless water heater, check the condition of the high limit switch, and replace it if necessary. To reset the error code, power off and on the unit.
What does the Noritz error code 59 mean?
Noritz error code 59 means there is a combustion abnormality that is also associated with low input BTU. Inspect the gas pressure and check for any blockage or debris near or around the venting, fan motor, and burner chamber. If used at high altitude, readjust the unit accordingly.
