What does the Ideal Logic Max F66 fault code mean?
The F66 fault code on the Ideal Logic Max indicates a malfunction of the central heating (CH) flow switch. This issue typically prevents the boiler from operating correctly, leading to heating problems.
Common Causes
- Faulty Flow Switch: The flow switch may be stuck or damaged, preventing it from detecting water flow accurately.
- Electrical Issues: Wiring problems or a malfunctioning PCB (printed circuit board) can disrupt the flow switch’s operation.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional expertise. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F66 fault code is around £150 to £250, primarily due to the need for a new flow switch and potential electrical diagnostics.