What does the Baxi Platinum F45 fault code mean?
The F45 fault code on a Baxi Platinum boiler indicates a fault with the central heating (CH) flow switch. This typically means that the boiler is unable to detect the flow of water through the heating system, which can prevent it from operating correctly.
Common Causes
- Blocked or Dirty Flow Switch: Debris or scale buildup can obstruct the flow switch, preventing it from functioning properly.
- Electrical Connection Issues: Loose or damaged wiring to the flow switch can disrupt communication between the switch and the boiler’s control board.
Can I fix it myself? (DIY)
While some basic troubleshooting can be attempted, such as checking for blockages, it is highly recommended to call a Gas Safe Engineer for any repairs involving gas or electrical components to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the F45 fault could range from £150 to £250, primarily depending on whether the flow switch needs cleaning or replacement. This includes labour costs and the price of parts, which can vary based on the specific issue encountered.