What does the Ideal Mexico HE F97 fault code mean?
The F97 fault code on the Ideal Mexico HE indicates a Domestic Hot Water (DHW) timeout issue, meaning the boiler is unable to heat the water within the expected time frame. This can lead to insufficient hot water supply for taps and showers.
Common Causes
- Blocked Heat Exchanger: A build-up of limescale or debris can restrict water flow, preventing the boiler from heating water efficiently.
- Faulty DHW Sensor: If the sensor that monitors the temperature of the hot water is malfunctioning, it may not provide accurate readings, leading to a timeout.
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 can be dangerous to handle without proper training. Attempting to fix it yourself could void any warranty or insurance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F97 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement, or if the DHW sensor requires replacement. This cost reflects the complexity of the repairs and the need for professional expertise.