How to fix Ideal Logic Max fault code F80

What does the Ideal Logic Max F80 fault code mean?

The F80 fault code indicates a calibration mismatch with the central heating (CH) temperature sensor in the Ideal Logic Max boiler. This issue can lead to inaccurate temperature readings, potentially affecting the boiler’s performance and efficiency.

Common Causes

  • Faulty Temperature Sensor: The CH temperature sensor may be defective or damaged, leading to incorrect readings.
  • Wiring Issues: Damaged or loose wiring connections to the temperature 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 for this issue, as it involves gas and electrical components that require professional expertise. Attempting to fix it yourself could pose safety risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for the F80 fault code is around £150 to £250, primarily for replacing the temperature sensor and any necessary wiring repairs. This estimate reflects the cost of parts and labour for a qualified engineer.