High
EA 261 on Worcester Bosch Danesmoor

Your boiler's internal computer has encountered a memory or communication error and cannot operate until it is refreshed.

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.

Technical description

Heat control module (HCM) potentially defective – reset the appliance

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

EA 227View →EA 229View →F0View →

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