What does the Worcester Bosch Greenstar Si F44 fault code mean?
The F44 fault code on the Worcester Bosch Greenstar Si indicates a problem with the thermostat, which may be malfunctioning or not communicating properly with the boiler. This can lead to issues with heating and hot water supply.
Common Causes
- Faulty Thermostat: The thermostat may be defective or damaged, preventing it from accurately reading the temperature.
- Wiring Issues: Damaged or loose wiring connections to the thermostat can disrupt communication between the thermostat and the boiler.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any repairs related to gas appliances, including thermostat issues, as they can be complex and involve safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the F44 fault code is around £150 to £250, primarily due to the need for a replacement thermostat and potential wiring repairs, which require professional expertise.