What does the Ideal Mexico HE F85 fault code mean?
The F85 fault code on the Ideal Mexico HE indicates a domestic hot water (DHW) service fault, which typically signifies that the boiler is unable to provide hot water. This issue may arise from a malfunction in the DHW system or related components.
Common Causes
- Blocked DHW Heat Exchanger: A blockage in the heat exchanger can prevent hot water from circulating properly.
- Faulty DHW Sensor: A malfunctioning sensor may fail to detect the temperature correctly, leading to a service fault.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues. However, if you suspect a blockage, you can check the filters and ensure there are no obstructions in the system.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F85 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement. This cost reflects the complexity of the repair and the need for professional expertise.