Navien Boiler Error Code E005 – Flame Loss During Operation
Understanding Navien E005 error code, why flames are lost during operation, and when to call for professional boiler repair in Greater Vancouver.
What This Boiler Error Code Means
Error code E005 on your Navien boiler indicates flame loss during operation. This means the boiler successfully ignited and was running normally, but the flame was unexpectedly lost while the unit was calling for heat.
This is different from E003 (ignition failure) because the boiler did light initially. The flame sensing rod detected loss of flame and shut down the boiler as a safety precaution.
Is It Safe to Run the Boiler?
NO - Do not continue operating
Flame loss during operation indicates an unsafe condition. While one occurrence might be a temporary issue, repeated flame loss can indicate serious problems with gas supply, venting, or internal components.
Common Causes
What You Can Check (Safe Steps Only)
Check exterior vent terminations
Inspect for ice buildup, snow blockage, bird nests, or other obstructions. Clear visible external blockages only.
Verify consistent gas supply
Ensure other gas appliances in your home are working normally without interruption.
Note weather conditions
High winds can sometimes cause flame loss. If error occurs only during extreme weather, this may be a clue for the technician.
Attempt one reset
If error persists or returns within 24 hours, professional service is required.
When to Stop and Call a Boiler Technician
E005 error occurs more than once
Boiler cycles on and off repeatedly (short cycling)
You notice unusual smells or sounds from the boiler
Error happens at a specific point in the heating cycle
Your home is without reliable heat
Important: Flame loss can indicate dangerous conditions including incomplete combustion, carbon monoxide risk, or mechanical failure. Professional diagnosis is essential.
Same-Day & Emergency Boiler Repair – Greater Vancouver
ROMA Heating & Cooling - Navien Boiler Specialists
Our licensed technicians are experts in diagnosing and repairing Navien E005 flame loss errors. We carry specialized combustion analysis equipment and genuine Navien parts for same-day repairs across Greater Vancouver.
Call 778-909-5731 for Immediate ServiceServing Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, and all of Greater Vancouver with emergency boiler repair since 1999.