What does the Ideal Logic Max F49 fault code mean?
The F49 fault code indicates a problem with the domestic hot water (DHW) flow temperature, suggesting that the boiler is unable to achieve the desired temperature for hot water delivery. This could be due to a malfunctioning sensor or an issue with the boiler’s internal components.
Common Causes
- Faulty DHW Temperature Sensor: The sensor may be defective, leading to incorrect temperature readings and triggering the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heat transfer, resulting in insufficient hot water temperature.
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. Attempting DIY repairs could be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F49 fault could range from £150 to £300, depending on whether the DHW temperature sensor needs replacing or if the heat exchanger requires cleaning or replacement.