What does the Worcester Bosch Greenstar CDi F46 fault code mean?
The F46 fault code indicates a problem with the safety devices within the boiler, which are crucial for ensuring safe operation. This fault may arise from issues such as a malfunctioning pressure switch or a fault in the flue gas system.
Common Causes
- Faulty Pressure Switch: A defective pressure switch can fail to detect proper pressure levels, triggering the F46 fault code.
- Blocked Flue: A blockage in the flue system can prevent safe exhaust of gases, leading to safety device activation.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as it involves safety devices that are critical for the safe operation of the boiler. Attempting DIY repairs could pose serious risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F46 fault could range around £150 to £300, depending on whether the pressure switch needs replacing or if there are flue blockages that require clearing. This cost reflects the complexity of the issue and the need for professional expertise.