What does the Worcester Bosch Greenstar Ri F84 fault code mean?
The F84 fault code indicates a communication issue within the heating system, often related to the boiler’s internal components or sensors. This fault can prevent the boiler from operating correctly, leading to heating or hot water supply problems.
Common Causes
- Faulty Sensor: A malfunctioning temperature or pressure sensor can disrupt communication, triggering the F84 fault code.
- Wiring Issues: Damaged or loose wiring connections within the boiler can lead to communication failures, resulting in the F84 error.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to diagnose and repair this fault, as it may involve gas or electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F84 fault could be around £150 to £250, depending on whether a sensor replacement or wiring repair is needed. This cost reflects the complexity of the issue and the need for professional service.