What does the Worcester Bosch Greenstar Ri F33 fault code mean?
The F33 fault code indicates a problem with the air pressure switch in the Worcester Bosch Greenstar Ri boiler. This switch is crucial for ensuring that the boiler operates safely by detecting whether there is adequate airflow for combustion.
Common Causes
- Blocked Flue: A blockage in the flue can prevent proper airflow, causing the air pressure switch to fail.
- Faulty Air Pressure Switch: The switch itself may be defective or malfunctioning, leading to incorrect readings and triggering the fault code.
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 not handled correctly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the F33 fault code is around £150 to £250, which includes the cost of a new air pressure switch and labour. This price reflects the complexity of the repair and the need for a qualified technician.