Norritz tankless water heater Error Codes
Norritz tankless water heater Error Code List
If you have any concerns about your own or someone else's safety, please stop troubleshooting and call SPS Plumbing immediately.
11
Ignition failure
The unit is not igniting. Causes can include insufficient gas supply, blocked air intake, or a faulty ignition system.
12
Weak Flame
A weak flame is detected, preventing proper water heating. This is often due to a poor gas or air supply.
14
Thermal Fuse failure
The thermal fuse has blown, often due to a thermal overload. This usually requires professional service and replacement of the thermal fuse and potentially the heat exchanger.
16
High Water Temperature
The water temperature has become dangerously high, frequently caused by scale buildup in the heat exchanger.
29
High Water Level in Neutralizer
This is an issue with the condensate drain on condensing models. The drain may be blocked.
31
Inlet Thermistor Failure
The cold water thermistor is not functioning correctly.
32
Outlet Thermistor Failure
The hot water thermistor is not functioning correctly.
61
Fan Motor Failure
The fan motor is not working properly.
73
Circuit Board Setting Error
The circuit board has an improper setting.
90
Combustion Abnormality
A general error for an improper air-to-fuel mixture. It can result from insufficient gas pressure or an internal issue with the combustion system.
92, 93
Neutralizer Near End of Life
Indicates the neutralizer needs to be replaced.
903
Combustion Abnormality
Similar to error 90, this points to a problem with air, flame, or exhaust.
F76
Multi-System Communication Error
Occurs in multi-system installations, indicating a communication breakdown between units.
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