Home/Boiler Fault Codes/Glow-worm F29
GLOW-WORM FAULT CODE
Glow-worm F29
Also part of the ignition-fault family, and like F1/F4/F28 can follow a frozen or blocked condensate pipe in cold weather.
WHAT F29 TYPICALLY INDICATES
Also part of the ignition-fault family, and like F1/F4/F28 can follow a frozen or blocked condensate pipe in cold weather.
WHAT TO DO
This is not a DIY fix — it requires a Gas Safe registered engineer to diagnose and repair safely.
A NOTE ON GAS SAFE REGISTRATION
Any work on the gas side of a boiler in the UK legally requires a Gas Safe registered engineer, it isn't optional. Our engineers are fully Gas Safe registered, and you're always welcome to ask to see ID on the day. This page is general information about what a fault code typically indicates; it is not a substitute for an engineer diagnosing your specific boiler.
Seeing Glow-worm F29 on your boiler?
Tell us the code and your postcode. A fully Gas Safe registered engineer will diagnose the actual cause before quoting a fix.
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