High
2965 B on Worcester Bosch Greenstar 8000+ GR8701iW 32 C

Your boiler has temporarily stopped working because the water inside it has become too hot and cannot circulate properly.

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

Flow temperature too high. 1. Check the flow through the appliance and the system is filled. 2. Check for the air locks in the system and purge if required. 3. Check the isolation valves.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Wb 47114 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 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

All 99 fault codes on the Greenstar 8000+ GR8701iW 32 C

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

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