HOW TO FIX ERROR CODE E003
- danielqualityplumb
- Jul 1
- 1 min read
Error Code E003
EC45 or Error Code 45
Navien error code 003 indicates an ignition failure.
1. Check Gas and Power:
Gas Supply: Verify the gas supply valve is fully open and that the gas cylinder (if applicable) is not empty.
Power: Ensure the unit is properly connected to a power source.
2. Inspect the Ignition System:
Igniter and Flame Sensor: Look for any signs of damage or wear on the igniter and flame sensor. These components may need cleaning or replacement.
Air Intake Filter: A clogged air intake filter can restrict airflow, preventing ignition. Clean or replace the filter if needed.
Wiring: Check the wiring connections to the flame sensor and igniter.
3. Check Venting:
Blocked Vent: Ensure the venting system is not blocked or obstructed, as this can also cause ignition failure.
4. Potential Repairs:
Flame Rod Assembly: Replacing the flame rod/igniter assembly may be necessary.
Gas Pressure: Verify the gas pressure is within the correct range for the unit, especially if multiple fixtures are drawing hot water.
Control Board: In some cases, the control board may need to be replaced.
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