E20
FAULT CODE
Potterton
Flame Failure Lockout
Medium Severity
DIY Check Possible
The boiler has failed to detect a flame after the ignition sequence.
Cold Weather Note
Check for frozen condensate pipe in cold weather before calling an engineer.
Step-by-Step Fix Guide
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Step 1
Check gas supply is on
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Step 2
Check for frozen condensate pipe in cold weather
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Step 3
Reset once using the selector switch
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Step 4
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.