What does the Ideal Logic Max F73 fault code mean?
The F73 fault code indicates a calibration issue with the domestic hot water (DHW) flow switch in the Ideal Logic Max boiler. This fault prevents the boiler from accurately detecting water flow, which can disrupt hot water delivery.
Common Causes
- Faulty Flow Switch: The flow switch may be defective or stuck, preventing it from registering the correct flow of water.
- Wiring Issues: Damaged or loose wiring connections to the flow switch can lead to incorrect readings and trigger the fault code.
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 F73 fault code is around £150 to £250. This includes the cost of a new flow switch and labour, as the flow switch itself typically costs between £50 and £100.