What the manual says
Manufacturer manualThe boiler is waiting – there was a heat demand from the on off or modulating control
From this model's manual
Verified against the Worcester Bosch 35 Rsf installation & service manual.
DIY fix possible
Check that your room thermostat is set to the desired temperatureEnsure your heating programmer or timer is set to an 'ON' periodWait a few minutes for the boiler to complete its pre-ignition safety checks
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