What does the Ideal Logic Max F90 fault code mean?
The F90 fault code indicates a calibration mismatch with the central heating (CH) flow switch in the Ideal Logic Max boiler. This issue typically arises when the flow switch fails to detect the correct flow of water, which can affect the boiler’s operation and efficiency.
Common Causes
- Faulty Flow Switch: The flow switch may be malfunctioning or damaged, leading to incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the flow switch can cause communication problems between the switch and the boiler’s control board.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address 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 resolving the F90 fault code is approximately £150 to £250. This includes the cost of replacing the flow switch and any necessary labour charges from a qualified engineer.