Low
1-d4 on Worcester Bosch Greenstar 8000 Life Regular

Your boiler has detected an issue with your solar water heating system, meaning it cannot currently communicate with or properly integrate the solar-heated water into your home's system.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Solar fault Is only displayed, if a solar module is connected.

From this model's manual
Verified against the Worcester Bosch Greenstar 8000 Life Regular installation & service 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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