How to fix Ideal Logic Max fault code F48

What does the Ideal Logic Max F48 fault code mean?

The F48 fault code indicates a fault with the central heating (CH) temperature sensor in the Ideal Logic Max boiler. This sensor is crucial for monitoring the temperature of the water in the heating system, and a fault can disrupt the boiler’s operation.

Common Causes

  • Faulty 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 with the boiler’s control system.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential safety risks. Attempting to fix it yourself could void warranties or lead to further complications.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for replacing the CH temperature sensor is around £150 to £200. This includes the cost of the part and labour, as sensor replacement typically requires professional expertise.