Vaillant F29: Flame loss during operation
Safety related: do not keep resettingWhat it means
The flame went out while running. Poor gas supply, flue problem, or condensate backing up.
Safe things to try first
- Check the condensate pipe outside for ice.
- Reset once.
When to call an engineer
Persistent F29 needs a combustion and gas pressure check.
Never remove the boiler cover or work on gas components yourself. It is illegal unless you are Gas Safe registered, and it will void your warranty.
Fix Vaillant F29 today
Boiler repair from £75. 92% of repairs fixed on the first visit with parts from the van.