What does the Ideal Mini F59 fault code mean?
The F59 fault code on the Ideal Mini indicates a problem with the domestic hot water (DHW) outlet temperature, suggesting that the boiler is unable to maintain the desired temperature for hot water delivery. This issue can lead to inconsistent hot water supply and may require immediate attention.
Common Causes
- Faulty DHW Sensor: A malfunctioning sensor may not accurately detect the water temperature, causing the boiler to misread and trigger the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heat transfer, leading to inadequate hot water temperatures and the F59 error.
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 DIY repairs could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F59 fault could be around £150 to £250, primarily depending on whether the DHW sensor needs replacement or if the heat exchanger requires cleaning or servicing.