What does the Ideal Logic Max F23 fault code mean?
The F23 fault code on the Ideal Logic Max indicates a flame failure, meaning the boiler is unable to detect a flame during operation. This can lead to the boiler shutting down to prevent unsafe conditions.
Common Causes
- Blocked Flue: A blockage in the flue can prevent proper ventilation, causing the flame to extinguish.
- Faulty Ignition Electrode: If the ignition electrode is damaged or malfunctioning, it may fail to ignite the gas properly.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues. However, you can check the pressure gauge and reset the boiler if the pressure is low, ensuring it is within the manufacturer’s recommended range.
Estimated Repair Cost (2026 UK Prices)
Repair costs for the F23 fault can range from £150 to £300, depending on whether the issue is a simple flue blockage or requires replacement of the ignition electrode, which can be more expensive due to parts and labour.