Low
1013 on Worcester Bosch Greenstar 4000 GR4700iW 25 C

Your boiler has temporarily stopped because it has been running continuously for too long without a break.

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

Max. combustion point reached (the maximum burner time is reached)

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar 4000 Combi 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.

DIY fix possible

Wait 10 to 15 minutes to allow the boiler to cool down and automatically reset.Turn the heating or hot water off and on again using your room thermostat or boiler controls.If the code persists, try turning the boiler off at the fused spur, waiting one minute, and turning it back on.

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Related fault codes

All 92 fault codes on the Greenstar 4000 GR4700iW 25 C

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

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