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Michele StevensAug 18, 2025
What to do if Viessmann VITOFLAME 300 Burner starts, but no flame is formed?
- SSamuel HicksAug 18, 2025
If your Viessmann burner starts but doesn't produce a flame, several issues could be the cause. The ignition electrodes may be incorrectly adjusted; set them correctly according to the relevant instructions. They might also be damp or contaminated; clean the ignition electrode block. Another possibility is a cracked insulation body of the ignition electrodes, in which case you should replace the ignition electrode block. The ignition transformer or cable could be faulty, requiring replacement. Finally, the pump might not be supplying oil. To check this, mount pressure and vacuum gauges at the pump and check build-up of pressure.





