How to fix Worcester Bosch Greenstar i fault code F38

What does the Worcester Bosch Greenstar i F38 fault code mean?

The F38 fault code indicates a problem with the ignition electrode in the Worcester Bosch Greenstar i boiler. This typically means that the electrode is either faulty or not functioning correctly, preventing the boiler from igniting properly.

Common Causes

  • Faulty Ignition Electrode: The electrode may be damaged or worn out, leading to failure in producing a spark for ignition.
  • Dirty Electrode: Accumulation of debris or carbon build-up on the electrode can hinder its ability to create a spark.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that can be hazardous if handled improperly.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for replacing a faulty ignition electrode is around £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.