Oil boiler not heating up

[Gary at home]

I have a danesmore 20/25 oil boiler and it is firing up but it’s producing no heat to the water or the radiators

My next door neighbour an electrician has checked the cylinder and thermostat and they all check out ok so he thinks the problem is within the boiler

Can Someone help give me some advice as to what it may be

Many thanks

 

[SimonG]

If its not producing heat then it's not firing up. I'm guessing rdb riello burner?

Could well be photocell.