What does the Ideal Mini F57 fault code mean?
The F57 fault code on the Ideal Mini indicates a problem with the domestic hot water (DHW) return temperature. This typically suggests that the return temperature is either too low or not being detected correctly by the boiler’s sensors.
Common Causes
- Blocked Heat Exchanger: A blockage can prevent proper water flow, leading to incorrect temperature readings.
- Faulty Temperature Sensor: If the temperature sensor is malfunctioning, it may not accurately report the return temperature to the boiler.
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 to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F57 fault could be around £150 to £250, primarily due to the potential need for replacing a faulty temperature sensor or cleaning a blocked heat exchanger, both of which require professional service.