Navien Water Heater Error Code 30: How to Fix It

Q: What does Navien error code 30 mean?

Error code 30 indicates that the exhaust gas temperature sensor is detecting abnormal readings, which could signal overheating, blocked vents, or combustion problems.

Q: Is it safe to use my Navien water heater with error code 30?

No, do not use the water heater when error code 30 appears. This is a high-severity safety error that requires immediate attention to prevent dangerous conditions.

Q: How much does it cost to fix Navien error code 30?

Costs vary depending on the cause. Simple vent cleaning may cost $100-200, while temperature sensor replacement can range from $200-400 including labor.

Q: Can I reset Navien error code 30 myself?

You can attempt a reset after addressing the underlying cause, but simply resetting without fixing the problem will cause the error to return and may create safety hazards.

Q: How often should I clean my Navien water heater exhaust vent?

Inspect and clean the exhaust vent at least twice per year, and after severe weather that might cause blockages. Regular maintenance prevents many error code 30 occurrences.

Abstract

Navien error code 30 (also displayed as E030) indicates that your water heater's exhaust gas temperature sensor is detecting abnormal readings. This is a high-severity safety error that can cause your unit to shut down to prevent overheating or dangerous exhaust conditions.