F.27
FAULT CODE
Glow-worm
Flame Detection Fault (Energy Range)
High Severity
Engineer Required
On Glow-worm Energy boilers, F.27 indicates a fault in the flame detection circuit. Shared with older Betacom models as F16.
Step-by-Step Fix Guide
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Step 1
Do not repeatedly reset
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Step 2 Engineer only
Call a Gas Safe engineer to inspect the ionisation electrode and PCB
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.