001
FAULT CODE
Navien
Ignition Failure
High Severity
Engineer Required
The boiler has failed to ignite after multiple attempts. The gas supply, spark electrodes, or gas valve may be at fault.
Cold Weather Note
A frozen condensate pipe may prevent ignition.
Step-by-Step Fix Guide
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Step 1
Check that the gas supply is on
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Step 2
Try resetting the boiler
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Step 3 Engineer only
If the fault persists, call a Gas Safe engineer to check the ignition system
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.