An error code 14 indicates a significant overheat of the heat exchanger has occurred. Much like a fuse in automotive applications or other electrical uses the thermal fuse is a one time use part as it is physically broken once it’s tripped by an overheat. The thermal fuse is wrapped…
An error code 12 indicates a flame loss. This means that the unit is detecting a flame, but the flame is being extinguished during operation (weak flame). Most of the same troubleshooting used in the Error Code 11 article can be applied to the error code 12 such as cleaning the flame rod…
The Error Code 11 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…
The following list has downloadable PDFS for reference in replacing a Noritz Tankless heat exchanger. See the list below for the models in question. N-069M and N-063S Models: N-063S-1-LP, N-063S-1-NG, N-063S-CAN-LP, N-063S-CAN-NG, N-063S-LP, N-063S-NG, N-063S-OD-LP, N-063S-OD-NG, N-069M-1-LP, N-069M-1-NG, N-069M-CAN-LP, N-069M-CAN-NG, N-069M-LP, N-069M-NG, N-069M-OD-LP, N-069M-OD-NG N-084M and N-069M-DV Models: N-069M-DV-CAN-LP, N-069M-DV-CAN-NG, N-069M-DV-LP, N-069M-DV-NG,…
Troubleshooting for abnormalities due to Scale Build-up C1# If the alarm code “C1#” is flashing on the display window, it means there is scale build-up in the heat exchanger. Damage to the water heater due to scale build-up is not covered by the water heater’s warranty. To prevent damage to…
An error code 72 indicates a Flame Rod circuit abnormality. This error is triggered when the Flame Rod detects a flame before ignition (detection of flame when no flame is present). For further technical assistance call 866-766-7489 or use our Contractor Locator to find a local service representative.
An error code 70 indicates a Circuit Board Abnormality. Disconnect the electrical power, then reconnect electrical power to the Unit to reset the system.If the Circuit Board abnormality continues, replace the Circuit Board. For further technical assistance call 866-766-7489 or use our Contractor Locator to find a local service representative.
An error code 66 indicates a Bypass Water Servo abnormality. Please verify that the Bypass Water Servo is securely connected to the Wire Harness, and that the Wire Harness is properly connected to the Circuit Board. For further technical assistance call 866-766-7489 or use our Contractor Locator to find a…
An error code 65 indicates a Main Water Servo abnormality. Please verify that the Main Water Servo is securely connected to the Wire Harness, and that the Wire Harness is properly connected to the Circuit Board. For further technical assistance call 866-766-7489 or use our Contractor Locator to find a…
An error code 63 is recirculation abnormality. Please verify that the recirculation pump connected to the Wire Harness, and that the Wire Harness is properly connected to the Circuit Board. If the wire harness is properly connected, there might be an issue with either the recirculation pump or the circuit…