What the manual says
Manufacturer manualHeating has no heat demand. The burner is off.
From this model's manual
Verified against the Glow Worm Flexicom 24c 28c installation & service manual, page 46.
DIY fix possible
Check your room thermostat to ensure the target temperature is set higher than the current room temperatureEnsure your heating programmer or timer is currently in an 'ON' periodTurn on a hot water tap to see if the status code changes, confirming the boiler is responding to a demand
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