Medium
6 on Worcester Bosch Greenstar Ri

Your boiler has temporarily stopped working because it cannot properly read its internal temperature sensors.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

What the manual says

Manufacturer manual

Sensor test failed

Shared across the Greenstar 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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

E9View →d1View →d5View →

All 15 fault codes on the Greenstar Ri

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

1 (Group 1)2 (Group 1)3 (Group 1)4 (Group 1)5 (Group 1)789101112131415

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