What does the Ideal Mexico HE F38 fault code mean?
The F38 fault code on the Ideal Mexico HE indicates a domestic hot water (DHW) flow fault, which typically means that the boiler is unable to detect the flow of hot water through the system. This can lead to inadequate hot water supply for taps and showers.
Common Causes
- Blocked DHW Flow Sensor: A blockage in the flow sensor can prevent accurate readings, causing the boiler to shut down the hot water supply.
- Faulty Diverter Valve: If the diverter valve is stuck or malfunctioning, it may not properly direct water flow between the heating and hot water systems.
Can I fix it myself? (DIY)
While some basic checks can be performed, such as ensuring there are no blockages in the system, it is strongly advised to call a Gas Safe Engineer for any gas or electrical issues to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F38 fault could range from £150 to £300, depending on whether the issue is a simple sensor replacement or a more complex diverter valve repair. Costs may vary based on parts and labour in your area.