What does the Worcester Bosch Greenstar i F43 fault code mean?
The F43 fault code indicates a problem with the cold water sensor in the Worcester Bosch Greenstar i boiler. This sensor is crucial for monitoring the temperature of the cold water supply, and a fault can lead to improper boiler operation.
Common Causes
- Faulty Cold Water Sensor: The sensor may be malfunctioning due to wear and tear or electrical issues.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt its functionality.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty cold water sensor in a Worcester Bosch Greenstar i boiler is around £150 to £200. This includes the cost of the part and labour, reflecting the specific nature of the repair.