002
FAULT CODE
Navien
Flame Loss During Operation
High Severity
Engineer Required
The flame was established but has been lost unexpectedly. This may indicate a gas supply interruption.
Step-by-Step Fix Guide
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Step 1
Check other gas appliances are working
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Step 2
Check the flue terminal for wind-related issues
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Step 3 Engineer only
A Gas Safe engineer should inspect the gas valve and flame sensor
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.