High
PCB Fault on Ideal Logic Max System

Your boiler's main internal computer has developed a serious glitch or hardware failure, meaning the unit cannot safely manage its functions.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Contact Installer

From this model's manual
Verified against the Ideal Logic Max System installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This fault occurs when the boiler's central control hub suffers an internal electrical failure or loses communication with its sensors. The most common reasons include a power surge that has damaged the delicate circuitry or moisture getting into the casing and causing a short circuit.

This fault is slightly more common in winter when the boiler is under high demand and components are subjected to more thermal stress and vibrations.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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