Medium
E593 on Navien NCB

Your boiler's electronic control panel is experiencing a communication error, meaning it cannot properly register your inputs or display settings.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Abnormal operation: Touch IC (Panel PCB)

Engineer required

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

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