What does the Ideal Mexico HE F73 fault code mean?
The F73 fault code on the Ideal Mexico HE indicates a domestic hot water (DHW) safety fault, which typically arises when the boiler detects an issue that could compromise safe operation while heating water. This fault prevents the boiler from operating to ensure user safety.
Common Causes
- Blocked DHW Heat Exchanger: A blockage can restrict water flow, leading to overheating and triggering the safety fault.
- Faulty DHW Sensor: If the temperature sensor is malfunctioning, it may incorrectly signal that the water is too hot, causing the boiler to shut down.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any repairs related to gas or electrical components. Attempting to fix these issues without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F73 fault could be around £150 to £250, primarily depending on whether the DHW heat exchanger needs cleaning or replacement, as well as the cost of labour.