F29
FAULT CODE
Heatline
Flame Loss During Operation
Medium Severity
DIY Check Possible
The boiler ignited but then lost its flame during operation. Often caused by gas supply issues or a blocked condensate drain.
Cold Weather Note
Check condensate pipe first in cold weather.
Step-by-Step Fix Guide
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Step 1
Check condensate pipe in cold weather
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Step 2
Check gas supply
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Step 3
Reset once
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Step 4
Call a Gas Safe engineer if fault persists
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.