What does the Ideal Logic Plus F27 fault code mean?
The F27 fault code on the Ideal Logic Plus indicates that the return temperature of the heating system is too high, which can prevent the boiler from operating efficiently. This issue may lead to overheating and potential damage if not addressed promptly.
Common Causes
- Blocked Heat Exchanger: A blockage in the heat exchanger can restrict the flow of water, causing the return temperature to rise excessively.
- Faulty Thermistor: A malfunctioning thermistor may incorrectly read the return temperature, leading to erroneous fault codes and boiler shutdown.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it may involve gas or electrical components that require professional handling. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F27 fault code is around £150 to £250, depending on whether the issue is a simple thermistor replacement or a more complex heat exchanger cleaning or replacement.