Firebird oil boiler non starter

[wolbut]

Hi - i have a Firebird combi 90 oil boiler - working fine until last week when the flow switch split - turned off the mains supply to it and isolated the water - fitted a new switch 5 days later -turned water and power back on & tried to restart it - the blower/fan is running but the burner does not fire - it does not even try to fire - any ideas ?

 

[kimbo]

Has it got a rdb burner that is the one with the red plastic cover surround. If it has it is a classic symptom of a faulty photocell. To check turn off boiler, open top of control box and remove brown and blue wire of photocell (just pulls off) start boiler again, if it fires and then goes to lockout then that confirms a faulty photocell.

 

[wolbut]

thanks Kimbo - its a Riello burner - i will try pulling the wires to the cell in the morning ( its an outside boiler and its dark)

 

[wolbut]

Thanks Kimbo but the photocell is soldered in place on a PCB so could not disconnect it and do the test

 

[kimbo]

It just slides off frontwards

 

[wolbut]

Top man - yes it slides off -- unfortunately it still would not attempt to start - thanks anyway

 

[kimbo]

In that case its probably the control box

 

[wolbut]

Hi Kimbo - yes - i think you are right - thanks for you help

 

[wolbut]

Hi Kimbo - fitted a new control box and photocell - still no joy !

 

[kimbo]

Go through the sequence of what exactly happens.