What does the Worcester Bosch Greenstar Si F34 fault code mean?
The F34 fault code indicates a problem with the combustion sensor in the Worcester Bosch Greenstar Si boiler. This sensor is crucial for monitoring the combustion process and ensuring safe operation.
Common Causes
- Dirty or Blocked Sensor: Accumulation of soot or debris can impair the sensor’s ability to function correctly.
- Electrical Fault: Issues with wiring or connections to the combustion sensor can lead to incorrect readings and trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional expertise to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty combustion sensor in a Worcester Bosch Greenstar Si boiler is approximately £150 to £250. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.