What does the Ideal Mexico HE F33 fault code mean?
The F33 fault code indicates a low temperature limit fault in the Ideal Mexico HE boiler. This typically means that the boiler is unable to reach or maintain the required temperature for safe operation.
Common Causes
- Faulty Temperature Sensor: A malfunctioning temperature sensor may incorrectly read the water temperature, triggering the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heat transfer, leading to low temperature readings.
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 handling for safety reasons.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F33 fault could be around £150 to £250, primarily due to the potential need for replacing the temperature sensor or cleaning the heat exchanger, which involves labour and parts.