How to fix Ideal Logic Plus fault code F34

What does the Ideal Logic Plus F34 fault code mean?

The F34 fault code on the Ideal Logic Plus indicates a problem with the printed circuit board (PCB), which is essential for the boiler’s operation. This fault typically suggests that the PCB is either malfunctioning or has failed, preventing the boiler from functioning correctly.

Common Causes

  • Electrical Surge: A sudden spike in electrical supply can damage the PCB.
  • Moisture Ingress: Water or condensation can cause short circuits on the PCB, leading to failure.

Can I fix it myself? (DIY)

It is highly recommended to call a Gas Safe Engineer for any issues related to the PCB, as it involves electrical components and gas safety regulations. Attempting to fix it yourself could pose serious risks.

Estimated Repair Cost (2026 UK Prices)

The estimated cost for replacing a faulty PCB in an Ideal Logic Plus boiler is around £250 to £350. This includes the price of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.