What does the Ideal Mexico HE F43 fault code mean?
The F43 fault code on the Ideal Mexico HE indicates a central heating (CH) temperature fault, which suggests that the boiler is unable to reach or maintain the desired temperature for the heating system. This can lead to inadequate heating performance and may require immediate attention.
Common Causes
- Faulty Temperature Sensor: A malfunctioning temperature sensor may provide incorrect readings, causing the boiler to fail in regulating the heating temperature.
- Blocked Heat Exchanger: A blockage in the heat exchanger can restrict water flow, preventing the boiler from heating the water effectively.
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 DIY repairs could be dangerous and may void your warranty.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F43 fault could range from £150 to £300, depending on whether the temperature sensor needs replacement or if the heat exchanger requires cleaning or repair. This cost reflects the complexity of the work and the parts involved.