012
FAULT CODE
Navien
Flame Loss During Operation
Medium Severity
DIY Check Possible
The boiler ignited but then lost its flame during operation. Reset required.
Cold Weather Note
Check condensate pipe first in cold weather.
Step-by-Step Fix Guide
-
Step 1
Check condensate pipe in cold weather and thaw if frozen
-
Step 2
Reset the boiler
-
Step 3
If fault persists, call a Gas Safe engineer
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.