High
E0 on Worcester Bosch Ri 25 HE

Your boiler's main computer chip has encountered an internal error and cannot communicate properly to start the heating process.

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

Internal error on the PCB

Shared across the 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

EAView →E9View →

All 9 fault codes on the Ri 25 HE

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

00 - FFA1A5A8C4d1F0FC

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