What does the Worcester Bosch Greenstar Si F49 fault code mean?
The F49 fault code indicates a problem with the heat exchanger in the Worcester Bosch Greenstar Si boiler. This typically means that the heat exchanger is either blocked, leaking, or has suffered a failure, affecting the boiler’s ability to heat water efficiently.
Common Causes
- Blockage: Debris or sludge accumulation can obstruct the heat exchanger, preventing proper heat transfer.
- Corrosion: Over time, corrosion can lead to leaks or structural failure within the heat exchanger.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as working on the heat exchanger involves gas and electrical components that require professional expertise. Attempting DIY repairs can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty heat exchanger in a Worcester Bosch Greenstar Si boiler is approximately £600 to £800. This includes parts and labour, as heat exchanger replacement is a complex task requiring professional installation.