What does the Ideal Mexico HE F90 fault code mean?
The F90 fault code on the Ideal Mexico HE indicates a central heating (CH) calibration fault. This typically means that the boiler is unable to properly calibrate the heating system, which can affect its efficiency and performance.
Common Causes
- Faulty Sensor: A malfunctioning temperature sensor can lead to incorrect readings, causing calibration issues.
- Wiring Issues: Damaged or loose wiring connections can disrupt communication between components, resulting in a calibration fault.
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. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F90 fault could be around £150 to £250, primarily depending on whether a sensor replacement is needed or if wiring repairs are required. This estimate includes parts and labour.