PCB FAULT High

Ideal PCB FAULT Fault Code

Also written as PCBFAULT — same fault.

The Ideal PCB FAULT fault code means: your boiler's main internal computer has developed a critical software or hardware failure and can no longer control the heating or hot water safely.. It appears on 8 Ideal models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Replace PCB.

What causes the Ideal PCB FAULT fault?

This fault occurs when the boiler's central control board suffers a hardware failure, often due to an electrical surge or moisture ingress. Over time, heat stress or liquid from a small internal leak can damage the delicate circuitry, leading to a total communication failure between the components.

Typical repair cost £350-£550 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ideal models that show the PCB FAULT fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal PCB FAULT fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026