Anyone?! - Diesel boiler fires then fails...

[macson19]

My Oil boiler (Bubble) fires then fails within 5 seconds. However if I then reset the 'lock out' button (it is not locked out - the red light is still flashing intermittently) the boiler starts up and runs normally for the heating period on the timer. When it needs to restart at the next heating cycle the same thing happens. Why does it do this? I could understand if it continually only fired for 5 seconds but for it to stall then be fine on the reset is confusing me. Photocell, solenoid, thermostat, reset button??? Anyone to point me in a direction to start looking for a fix would be appreciated. Thanks. Really - Has no one got an opinion on this???? 60 views and not even a pointer!

 

[oilhead]

Have it serviced !!! If it is running on diesel, then manufacturers recommendation is six months. There may also be a problem with thr preheater.

 

[oilhead]

Have it serviced !!! If it is running on diesel, then manufacturers recommendation is six months. There may also be a problem with thr preheater.

 

[Agile]

Seems it may not be seeing the flame at first!

Get it serviced!

 

[oilhead]

If this is, as I suspect, a very low output boiler running on 35 sec oil, then it relies on a fine preheated high pressure spray to enable ignition. Servicing will, or should include checking oil filters, replacing the nozzle, cleaning off the electrodes and checking oil pressure, all of which can affect start up, especially cold starts at this time of year.
35 sec oil varies so much in specification, and each delivery can cause problems with small throughputs that pass unnoticed on commercial boilers with much larger volumes.