Medium
1022 on Worcester Bosch Greenstar 8000 Style System

Your boiler is struggling to accurately measure the temperature of your stored hot water, so it has safely stopped heating the tank to prevent overheating.

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

Hot water storage temperature sensor is defective

Shared across the Greenstar 8000 Style System 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

1021View →

All 30 fault codes on the Greenstar 8000 Style System

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

20020120220320420822422722830530681510171065106810751076292029272946294829502963296429652966296729702971

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