What does the Ideal Mini F65 fault code mean?
The F65 fault code on the Ideal Mini indicates a problem with the domestic hot water (DHW) system pressure. This typically means that the pressure in the system is either too low or too high, which can affect the boiler’s ability to provide hot water efficiently.
Common Causes
- Low System Pressure: This can occur due to leaks in the system or insufficient water being added to the boiler.
- Faulty Pressure Sensor: A malfunctioning pressure sensor may incorrectly report the system pressure, triggering the fault code.
Can I fix it myself? (DIY)
If you are comfortable, you can check the pressure gauge on the boiler. If the pressure is below 1 bar, you can safely re-pressurise the system using the filling loop. However, if you suspect a leak or if the issue persists, it is crucial to call a Gas Safe Engineer for further diagnosis and repair.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing an F65 fault could range from £100 to £250, depending on whether it’s a simple re-pressurisation or if a faulty pressure sensor needs replacement, which can be more expensive due to parts and labour.