What does the Ideal Logic Max F78 fault code mean?
The F78 fault code indicates a calibration mismatch with the central heating (CH) flow switch in the Ideal Logic Max boiler. This issue can prevent the boiler from properly detecting water flow, leading to heating inefficiencies or shutdowns.
Common Causes
- Faulty Flow Switch: The flow switch may be malfunctioning or damaged, causing incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the flow switch can lead to calibration mismatches.
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 resolving the F78 fault code is around £150 to £250, primarily due to the potential need for a new flow switch and professional labour costs.