Glow-worm boiler showing F29 in Tipton? It means the flame went out while the boiler was running. What causes it, what you can check, and when to call an engineer.
F29 on a Glow-worm usually means the flame went out after the boiler had already lit. It started, ran for a while, then lost the flame and locked out. Glow-worm is made by the same group as Vaillant, and the codes behave in a similar way. Check your manual for your exact model.
Because the boiler lit first, the cause is often the gas supply dipping or the boiler struggling to keep the flame steady. A prepayment meter running low, a blocked condensate pipe or a worn electrode are all common.
Glow-worm combis are everywhere in Tipton, from the terraces near the canal to the newer homes off Ocker Hill. Many replaced old back boilers and sit in kitchens with the condensate pipe running out through a cold back wall.
No. The boiler shut off safely when it lost the flame. Smell gas? Get everyone outside, leave switches alone and call 0800 111 999, the National Gas Emergency line. A code on the display is not a leak. A smell might be.
A fault that keeps returning is worth fixing before the cold sets in properly. Repeated lockouts usually mean a part is on its way out.
Reset once. If it locks out again, leave it off. Resetting again and again will not fix a supply or ignition fault.
Gas engineers carry a Gas Safe ID card. Check the back to see that boilers are on the list.
On a prepayment meter, look at the credit. A meter that runs out mid-cycle cuts the gas and gives exactly this code. Topping up and resetting once often clears it.
Light the hob. If it flickers or will not stay lit either, the gas supply to the house is the problem, not the boiler.
If F29 appears on cold mornings, the condensate pipe outside may be freezing. Pour warm water, not boiling, along it and reset once.
Gas pressure at the boiler, the electrode and its lead, the condensate trap and the flue. Most F29 repairs are a single part.
The display showing F29, the label inside the door, and whether you are on a prepayment meter. Say if it happens on heating, hot water or both.
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