What does the Ideal Mexico HE F45 fault code mean?
The F45 fault code on the Ideal Mexico HE indicates a central heating (CH) overheat condition. This typically occurs when the boiler’s temperature exceeds safe operating limits, potentially leading to system damage if not addressed promptly.
Common Causes
- Blocked Heat Exchanger: A buildup of debris or limescale can restrict water flow, causing overheating.
- Faulty Thermostat: An inaccurate or malfunctioning thermostat may fail to regulate the temperature correctly, leading to overheating.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing an F45 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement, or if the thermostat requires servicing.