Explanation of error codes in Navien water heaters. Navien error code 515-09 is one of the error codes that users may encounter on their Navien systems.. Open a support ticket with Navien. Describe the issue you are experiencing and provide as much information as possible. Request a technician to call you.
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Explore the causes of Navien error code 515-09 and learn how to fix navien error code 515-09 abnormal pcb with MorePCB.. Navien has issued a new part number for the pcb, #30027274B, which indicates that Navien recognized the problem and addressed it. On the box containing the new pcb the label has the listing "PCB (GWC303-6M) V12-2" in addition to the part number.