What the manual says
Manufacturer manualThermostat is calling for heat
From this model's manual
Verified against the Baxi Boiler Solo 3 30 Pf installation & service manual.
DIY fix possible
Check that your room thermostat is set to the desired temperatureEnsure your programmer or timer is set to an 'ON' periodWait for the boiler to complete its start-up sequence
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