What does the Ideal Mexico HE F86 fault code mean?
The F86 fault code on the Ideal Mexico HE boiler indicates a central heating (CH) service fault, typically related to issues with the boiler’s operation or components. This fault may prevent the boiler from providing heating effectively.
Common Causes
- Low Water Pressure: Insufficient water pressure can trigger the F86 fault, as the boiler requires a minimum pressure to operate correctly.
- Faulty Pump: A malfunctioning circulation pump may fail to circulate water through the heating system, leading to this error code.
Can I fix it myself? (DIY)
If you are comfortable, check the boiler’s pressure gauge and ensure it is within the recommended range (typically 1-1.5 bar). If the pressure is low, you can repressurise the system using the filling loop. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F86 fault could range from £150 to £300, depending on whether the issue is low water pressure or a faulty pump. Replacing a pump can be more expensive due to parts and labour costs.