Blue light constant on Worcester boiler but no heat

[Mishmash100]

Blue light on but no heat from radiators. When I reset the boiler, there is a slight chugging noise like it’s wanting to fire up but can’t. The blue light is on constantly

 

[Aquarius]

Ok, lots of Worcester boilers with blue lights, which model? Room thermostat turned up?

 

[cjg]

is the pump working?