How to fix Ideal Logic Max fault code F36

What does the Ideal Logic Max F36 fault code mean?

The F36 fault code on the Ideal Logic Max indicates a fault with the domestic hot water (DHW) sensor. This typically means that the sensor is either malfunctioning or not providing accurate temperature readings to the boiler’s control system.

Common Causes

  • Faulty DHW Sensor: The sensor may be damaged or defective, leading to incorrect temperature readings.
  • Wiring Issues: Damaged or loose wiring connections to the DHW sensor can disrupt communication between the sensor and the boiler.

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 handling. Attempting to fix it yourself could pose safety risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for replacing a DHW sensor on an Ideal Logic Max is around £150 to £200. This includes the cost of the part and labour, as sensor replacement typically requires professional expertise.