Navien NPN-160E Error Codes
Navien NPN-160E error codes and diagnostic codes (also listed as NPN-160E-NG, NPN-160E-LP). The NPN-160E is a Navien tankless water heater in the Navien NPN series.
Navien NPN-160E error codes list
| Code | Meaning | Severity |
|---|---|---|
| E21 | No hot water | Medium |
| E762 | Vent pipe not properly inserted | High |
| E773 | Wrong gas type detected | Critical |
Troubleshooting the NPN-160E
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Navien NPN-160E specs and setup data
- Installation clearances (indoor / outdoor) Navien · Tankless Water Heater · Navien NPN
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Homeowner help: Tankless Water Heater No Hot Water: What to Check
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.