What does the Ideal Logic Max F81 fault code mean?
The F81 fault code indicates a calibration error with the domestic hot water (DHW) flow switch in the Ideal Logic Max boiler. This issue can prevent the boiler from properly detecting water flow, leading to inadequate hot water supply.
Common Causes
- Faulty Flow Switch: The flow switch may be malfunctioning or damaged, causing incorrect readings.
- Blocked Water Path: A blockage in the water supply line can prevent proper flow, leading to calibration errors.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F81 fault code is around £150 to £250, primarily due to the potential need for a new flow switch and labour costs for a qualified engineer.