What does the Ideal Logic Max F79 fault code mean?
The F79 fault code indicates a calibration mismatch with the domestic hot water (DHW) temperature sensor in the Ideal Logic Max boiler. This issue can lead to inaccurate temperature readings and may affect the boiler’s ability to provide hot water efficiently.
Common Causes
- Faulty DHW Temperature Sensor: The sensor may be malfunctioning or damaged, leading to incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can cause communication problems, resulting in a calibration mismatch.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the F79 fault code is around £150 to £250, which includes the replacement of the DHW temperature sensor and any necessary wiring repairs. This cost reflects the price of parts and the labour involved in ensuring safe and proper installation.