What does the Worcester Bosch Greenstar CDi F99 fault code mean?
The F99 fault code on the Worcester Bosch Greenstar CDi indicates that the product has been discontinued and is no longer supported by the manufacturer. This can lead to difficulties in obtaining replacement parts or technical support for repairs.
Common Causes
- Discontinued Model: The model may have reached the end of its service life, making it obsolete.
- Lack of Parts Availability: As the product is discontinued, replacement parts may no longer be manufactured or supplied.
Can I fix it myself? (DIY)
Due to the nature of the fault code indicating product discontinuation, it is highly recommended to consult a Gas Safe Engineer for advice on replacement options rather than attempting any repairs yourself.
Estimated Repair Cost (2026 UK Prices)
Repair costs are likely to be high, potentially exceeding £500, as sourcing parts for a discontinued model can be challenging and may require complete replacement of the boiler.