What does the Baxi Platinum F99 fault code mean?
The F99 fault code on a Baxi Platinum boiler indicates a fault with the central heating (CH) pump sensor. This typically means that the sensor is either malfunctioning or not detecting the pump’s operation correctly.
Common Causes
- Faulty Pump Sensor: The sensor may be defective or damaged, leading to incorrect readings.
- Electrical Connection Issues: Loose or corroded connections can prevent the sensor from communicating properly with the boiler’s control board.
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 a faulty pump sensor on a Baxi Platinum boiler is around £150 to £200. This includes the cost of the replacement part and labour, as the sensor is a specific component that requires professional installation.