High
EA 261 on Worcester Bosch Heatslave

Your boiler's internal computer has encountered an error and cannot communicate properly, causing the system to stop working for safety.

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 →

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