Navien Boiler Error Code E003 – Ignition Failure
Understanding Navien E003 error code, common causes, and when to call for professional boiler repair in Greater Vancouver.
What This Boiler Error Code Means
Error code E003 on your Navien boiler indicates an ignition failure. This means the boiler attempted to light but was unable to establish a flame within the required time period. The boiler will typically make three ignition attempts before locking out and displaying this error code.
This is a safety lockout that prevents the boiler from operating until the issue is resolved. The boiler will not provide heat or hot water while this error is displayed.
Is It Safe to Run the Boiler?
NO - Do not attempt to bypass this error
The E003 error is a safety lockout. While the boiler will not operate in this state, you should not attempt to bypass safety mechanisms. Repeated reset attempts without addressing the underlying cause can lead to more serious damage.
Common Causes
What You Can Check (Safe Steps Only)
Check gas supply to your home
Verify other gas appliances are working. Ensure gas meter is on and gas valve to boiler is fully open.
Verify boiler has power
Check that the boiler is plugged in and the display is lit. Verify circuit breaker has not tripped.
Check for obvious vent blockages
Visually inspect exterior vent terminations for ice, snow, or debris. Do not disassemble venting.
Attempt one power reset
Turn off power to boiler for 30 seconds, then restore. If error returns, stop and call for service.
When to Stop and Call a Boiler Technician
Error code returns immediately after reset
You smell gas near the boiler (evacuate and call gas company immediately)
Boiler makes unusual noises during ignition attempts
Error has occurred multiple times or is recurring
You are without heat during cold weather
Important: Ignition failures can indicate serious safety issues. Continuing to reset the boiler without proper diagnosis can cause internal damage and create hazardous conditions.
Same-Day & Emergency Boiler Repair – Greater Vancouver
ROMA Heating & Cooling - Navien Boiler Specialists
Licensed, factory-trained technicians with genuine Navien parts. We diagnose and repair E003 ignition failures quickly and safely. Same-day emergency service available across Vancouver, Burnaby, Richmond, Surrey, Coquitlam, and all of Greater Vancouver.
Call 778-909-5731 for Immediate ServiceThis website is a specialized error-code resource operated as a division of ROMA Heating & Cooling, proudly serving Greater Vancouver since 1999.