What does the Ideal Logic Max F88 fault code mean?
The F88 fault code on the Ideal Logic Max indicates a calibration fault with the central heating (CH) temperature sensor. This issue can prevent the boiler from accurately measuring the water temperature, potentially leading to inefficient heating or system failure.
Common Causes
- Faulty Temperature Sensor: The temperature sensor may be malfunctioning or damaged, leading to incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt the signal, causing calibration errors.
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 resolving the F88 fault is around £150 to £250, primarily due to the need for a replacement temperature sensor and potential labour costs for a qualified engineer.