What does the Vaillant ecoTEC pro F28 fault code mean?
The F28 fault code on the Vaillant ecoTEC pro indicates a failure to ignite, which can prevent the boiler from operating properly. This issue typically arises due to problems with the gas supply or ignition components.
Common Causes
- Gas Supply Issue: A disruption in the gas supply, such as a closed valve or low gas pressure, can prevent ignition.
- Faulty Ignition Electrode: A malfunctioning ignition electrode may fail to create a spark, leading to the F28 error.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas-related issues, as working with gas appliances can be dangerous. However, you can check the gas supply and ensure that the gas valve is open.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F28 fault could be around £150 to £250, depending on whether the issue is with the gas supply or requires replacing the ignition electrode.