What does the Baxi Platinum F75 fault code mean?
The F75 fault code on a Baxi Platinum boiler indicates a central heating (CH) supply temperature fault, which typically means that the boiler is unable to reach the desired temperature for the heating system. This can lead to inadequate heating performance and may require immediate attention.
Common Causes
- Blocked Heat Exchanger: A buildup of debris or limescale can restrict water flow, preventing the boiler from heating water effectively.
- Faulty Temperature Sensor: If the temperature sensor is malfunctioning, it may incorrectly report the temperature, causing the boiler to shut down or not operate correctly.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas or electrical components. However, you can check the pressure gauge and ensure it is within the normal range (typically 1-1.5 bar) and reset the boiler if necessary.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F75 fault could range from £150 to £300, depending on whether a temperature sensor replacement or heat exchanger cleaning is required. This estimate includes parts and labour costs typical for such repairs.