Error Code 72 (Pro Series Models)
An error code 72 indicates a Flame Rod circuit abnormality. This error is triggered when the Flame Rod detects a...
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Error Code C1 (premix model)
Troubleshooting for abnormalities due to Scale Build-up C1# If the alarm code “C1#” is flashing on the display window, it... -
Error Code 11 (Pro Series Models)
The Error Code 11 is an ignition failure. In other words, the unit recognizes there is a demand for hot... -
Error Code 12 (Pro Series Models)
An error code 12 indicates a flame loss. This means that the unit is detecting a flame, but the flame... -
Error Code 14 (Pro Series Models)
An error code 14 indicates a significant overheat of the heat exchanger has occurred. Much like a fuse in automotive... -
Error Code 16 (Pro Series Models)
The 16 error code occurs when the outlet water temperature spikes to an abnormally high value. The heater will restrict... -
Error Code 20 (Pro Series Models)
The error code 20 means the High Limit Switch has been triggered. This error code generally requires a hard reset... -
Error Code 71 (Pro Series Models)
The error code 71 indicates a malfunction in the circuit board, specifically in the Gas Valve drive circuit or its... -
Error Code 73 (Pro Series Models)
The 73 error code indicates a circuit board setting issue. It is triggered by the following conditions: Any changes made... -
Error Code 90 (Pro Series Models)
The Error Code 90 indicates an airflow or combustion abnormality. (Error Code 10 is also troubleshot with the same methods)... -
Error Code 94 (Pro Series Models)
An error code 94 means the exhaust temperature is too high (condensing units). One of the benefits of installing a... -
Error Code 29 (Pro Series Models)
An error code 29 indicates a problem draining the condensate1 from the unit. This code only applies to our high efficiency condensing models. Just... -
Error Code 74 (Pro Series Models)
An error code 74 indicates a BLE (Bluetooth) communication issue. This error code only appears in the error history when... -
Error Code 79 (Pro Series Models)
An error Code 79 indicates a Circuit Board (pump control circuit) malfunction. To troubleshoot, first try resetting the system by... -
Error Code 50 (Pro Series Models)
An error code 50 indicates that the unit has detected continuous water flow of at least 0.26gpm or more for... -
Error Code 10 (Pro Series Models)
The error code 10 indicates a combustion abnormality and is usually a precursor to the more severe error code 90.... -
Error Code 41 (Pro Series Models)
This error code only applies to the Commercial NCC199CDV when in a multi until installation. This Error Code is displayed... -
Error Code 42 (premix model)
An error code 42 indicates a Water Flow Sensor (Recirculation) abnormality. This error is triggered when the system cannot maintain... -
Error Code 06 (Pro Series Models)
This error code only applies to the Residential NRCR model. An Error Code 06 indicates that the recirculation flow is... -
Error Code 91 (Pro Series Models)
An error code 91 means incorrect gas type. For new installs: 1. Check for gas type, gas orifice and gas... -
Error Code 760 (Pro Series Models)
An error code 760 is a remote controller transmission abnormality. In other words there is a communication problem between the... -
Error Code (F)76 (Pro Series Models)
Error code (F)76 indicates a multisystem communication error, which means there’s a problem with communication between units. In a quick...