What does the Ideal Mini F86 fault code mean?
The F86 fault code on the Ideal Mini indicates a central heating system pressure fault, typically signifying that the system pressure is either too low or too high. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.
Common Causes
- Low Water Pressure: This can occur due to leaks in the system or insufficient water in the boiler.
- High Water Pressure: This may result from a faulty pressure relief valve or expansion vessel issues.
Can I fix it myself? (DIY)
If the issue is low pressure, you can attempt to repressurise the system by using the filling loop on the boiler. However, if you are unsure or if the pressure is high, it is crucial to call a Gas Safe Engineer to avoid any gas or electrical hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing an F86 fault could range from £100 to £250, depending on whether it requires a simple pressure adjustment or replacement of components like the pressure relief valve or expansion vessel.