High
Spare PCB Not Set on Ideal Logic+ Combi C

Your boiler's computer module has been replaced but has not been programmed to match your specific heating system, preventing the boiler from functioning.

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

Spare PCB Not Set

Shared across the Logic COMBI2 range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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Related fault codes

L1View →L2View →

All 27 fault codes on the Logic+ Combi C

Seeing a different code? Every code this model can display, in one place.

4.34.44.54.64.74.84.94.104.114.124.13Fan FaultFlame LossFlame On Before Gas OnFlow Thermistor FaultFlow/Return ReversedHigh Mains VoltageIgnition LockoutLow Mains VoltageOutside Sensor FaultOverheat LockoutPCB FaultReturn Thermistor FaultRoom Stat FaultToo Many RestartsWater Pressure

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