Home / Error codes / Water heater / E003
Navien water heater error E003
Ignition failure. No gas supply or the igniter is faulty.
Serious · you can check this yourself
E003
Meaning: Ignition failure
What causes E003
No gas supply or the igniter is faulty.
What to do
Check the gas valve is open and press Reset. If it repeats, call a technician.
Can I fix it myself?
You can make the first check yourself, but stop there: this code can point to a serious fault.
If the code comes back
Book a visit and add the code to the booking. A technician arrives knowing which parts to bring, diagnoses the water heater for a flat $89 and gives you an exact quote before doing any work.
Same water heater
Other Navien water heater codes
Different appliance?
E003 on other machines
- Navien boilerIgnition failure