F51
FAULT CODE
Ferroli
Flame Signal Too Weak
High Severity
Engineer Required
The ionisation current is below minimum.
Step-by-Step Fix Guide
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Step 1 Engineer only
A Gas Safe engineer should clean or replace the electrode
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.