Viessmann VITOFLAME 300

Other manuals for Viessmann VITOFLAME 300

Questions and Answers

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Michele StevensAug 18, 2025
What to do if Viessmann VITOFLAME 300 Burner starts, but no flame is formed?
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  Samuel 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.
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Rachael ZunigaAug 25, 2025
Why Viessmann Burner does not start (with fault indication)?
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  Melissa Duncan DDSAug 25, 2025
  If the Viessmann burner doesn't start and shows a fault indication, several components may be at fault. The motor could be faulty, requiring replacement. The coupling between the motor and oil pump could be faulty, so replace the coupling. The oil pump may be seized up or sluggish; clean it, or replace it if necessary. Finally, the servomotor may be faulty, and should be replaced.
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georgedarrenAug 29, 2025
What to do if Viessmann Burner starts, but no oil is injected?
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  Mark HuffAug 29, 2025
  If the Viessmann burner starts, but no oil is injected, the solenoid valve coil may be faulty, so replace it. The oil pump itself may be faulty, requiring replacement. Alternatively, the nozzle could be blocked, in which case you should replace it.
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Logan HawkinsSep 4, 2025
Why is there external light during the pre-purge phase of my Viessmann VITOFLAME 300 Burner?
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  Gilbert DanielsSep 4, 2025
  If you observe external light during the pre-purge phase of your Viessmann burner, it could be due to several reasons. The oil pump solenoid valve might be failing to close, in which case you should replace the oil pump. Another possibility is a faulty flame monitor, which also requires replacement. Additionally, the ignition electrodes may be incorrectly adjusted or worn, so check and replace them if necessary.
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Derek DicksonNov 10, 2025
Why Viessmann Burner pump does not supply oil?
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  John BurgessNov 10, 2025
  If the Viessmann burner's pump isn't supplying oil, there are several potential causes. First, check if the shut-off valves at the filter or in the oil line are closed and open them. The filters may be blocked; clean the fuel oil filter and pump filter, replacing them if necessary. Also, a coupling between the motor and pump may be faulty, requiring replacement. Check for leaks in the suction line or filter bowl, retightening fittings or sealing oil lines as needed. Ensure the oil flow and return hoses are correctly connected according to the markings on the pump. High vacuum in the suction line (above 0.35 bar) may be the issue, so verify the sizing of the oil line cross-section, replace the filter, and check the external oil valve. Finally, the external oil valve itself may be faulty and...