What does the Worcester Bosch Greenstar Si F37 fault code mean?
The F37 fault code indicates a problem with the flame sensor in the Worcester Bosch Greenstar Si boiler. This sensor is responsible for detecting the presence of a flame during operation, and if it fails, the boiler will not function properly to ensure safety.
Common Causes
- Dirty Flame Sensor: A buildup of soot or debris can prevent the sensor from accurately detecting the flame.
- Faulty Flame Sensor: The sensor itself may be malfunctioning or damaged, requiring replacement.
Can I fix it myself? (DIY)
While cleaning the flame sensor can be a DIY task, it is highly recommended to call a Gas Safe Engineer for any gas or electrical issues to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated cost for replacing a faulty flame sensor in a Worcester Bosch Greenstar Si boiler is around £120 to £180. This includes the cost of the part and labour, reflecting the specific nature of the repair and the expertise required.