What does the Baxi Platinum F35 fault code mean?
The F35 fault code on a Baxi Platinum boiler indicates a problem with the printed circuit board (PCB). This issue can disrupt the boiler’s operation, leading to heating and hot water failures.
Common Causes
- Electrical Faults: Issues such as short circuits or damaged wiring can affect the PCB’s functionality.
- Component Failure: A malfunctioning component connected to the PCB, like sensors or relays, may cause the fault code to appear.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for any repairs related to the PCB, as these involve complex electrical components and safety risks. Attempting DIY repairs could void warranties or lead to further damage.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing a PCB fault on a Baxi Platinum boiler is around £300 to £400. This includes the cost of the replacement PCB and labour, reflecting the complexity of the repair and the need for professional expertise.