Error Code 72 (premix model) An error code 72 indicates a Flame Rod circuit abnormality. This error is triggered when the Flame Rod detects a...
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 (Premix Model) The Error Code 11 is an ignition failure. In other words, the unit recognizes there is a demand for hot...
Error Code 12 (premix model) An error code 12 indicates a flame loss. This means that the unit is detecting a flame, but the flame...
Error Code 14 (premix model) An error code 14 indicates a significant overheat of the heat exchanger has occurred. Much like a fuse in automotive...
Error Code 16 (premix model) The 16 error code occurs when the outlet water temperature spikes to an abnormally high value. The heater will restrict...
Error Code 20 (premix model) The error code 20 means the High Limit Switch has been triggered. This error code generally requires a hard reset...
Error Code 71 (premix model) The error code 71 indicates a malfunction in the circuit board, specifically in the Gas Valve drive circuit or its...
Error Code 73 (premix model) The 73 error code indicates a circuit board setting issue. It is triggered by the following conditions: Any changes made...
Error Code 90 (premix model) The Error Code 90 indicates an airflow or combustion abnormality. (Error Code 10 is also troubleshot with the same methods)...
Error Code 94 (premix model) An error code 94 means the exhaust temperature is too high (condensing units). One of the benefits of installing a...
Error Code 29 (premix model) 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 (premix model) An error code 74 indicates a BLE (Bluetooth) communication issue. This error code only appears in the error history when...
Error Code 79 (premix model) An error Code 79 indicates a Circuit Board (pump control circuit) malfunction. To troubleshoot, first try resetting the system by...
Error Code 50 (premix model) An error code 50 indicates that the unit has detected continuous water flow of at least 0.26gpm or more for...
Error Code 10 (premix model) The error code 10 indicates a combustion abnormality and is usually a precursor to the more severe error code 90....
Error Code 41 (premix model) 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 (premix model) This error code only applies to the Residential NRCR model. An Error Code 06 indicates that the recirculation flow is...
Error Code 91 (premix model) An error code 91 means incorrect gas type. For new installs: 1. Check for gas type, gas orifice and gas...
Error Code 760 (premix model) An error code 760 is a remote controller transmission abnormality. In other words there is a communication problem between the...
Error Code (F)76 (premix model) Error code (F)76 indicates a multisystem communication error, which means there’s a problem with communication between units. In a quick...