What does the Worcester Bosch Greenstar i F28 fault code mean?
The F28 fault code indicates an ignition failure in the Worcester Bosch Greenstar i boiler. This typically means that the boiler is unable to ignite the gas, preventing it from heating water.
Common Causes
- Gas Supply Issue: There may be a problem with the gas supply, such as a closed valve or a gas leak.
- Electrode Fault: The ignition electrode may be dirty or faulty, preventing it from creating a spark to ignite the gas.
Can I fix it myself? (DIY)
It is recommended to check the gas supply and ensure that the gas valve is open. However, for any electrical or gas-related issues, it is crucial to call a Gas Safe Engineer to avoid safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F28 fault could range from £100 to £250, depending on whether the issue is a simple gas supply check or requires replacement of the ignition electrode.