The Navien error code 762 means there's most likely an issue with the exhaust vent. The main reason behind getting this code in Navien heaters is not installing the vent correctly.. One common error code that Navien users may come across is the 762 error code. When this code appears on your Navien unit, it indicates a circulation pump issue that needs attention.
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Navien Error Codes and Troubleshooting solutions for Navien tankless systems in accordance with the manufacturer recommendations.. This is a complete guide on Navien Tankless Water Heater Error Codes where I will disclose every meaning of the common fault codes.