Background: HCC Thermotronic T2 oil-fired condensing boiler, that uses a Sterling 40 burner, which is fitted with a Danfoss BFP11 pump.
Fault: When first switched on, the burner fires up and runs normally for about 4 minutes. Then the flame goes out, and the burner locks-out after a few seconds. If I reset it immediately, it will not re-ignite and just locks-out again. If I leave it for about 15 minutes, it will re-light, but just goes out again after another 3 or 4 minutes.
Action so far: I thought it was simply being starved of oil, so I've replaced the oil line filter (Crossland 489) and ensured that oil is flowing freely right up to the burner pump. I've also removed the pump filter to check that is clean too.
Question: what would cause the burner to run normally for a few minutes and then just stop for no apparent reason?
Any suggestions would be most appreciated.
Cheers, DickM
Fault: When first switched on, the burner fires up and runs normally for about 4 minutes. Then the flame goes out, and the burner locks-out after a few seconds. If I reset it immediately, it will not re-ignite and just locks-out again. If I leave it for about 15 minutes, it will re-light, but just goes out again after another 3 or 4 minutes.
Action so far: I thought it was simply being starved of oil, so I've replaced the oil line filter (Crossland 489) and ensured that oil is flowing freely right up to the burner pump. I've also removed the pump filter to check that is clean too.
Question: what would cause the burner to run normally for a few minutes and then just stop for no apparent reason?
Any suggestions would be most appreciated.
Cheers, DickM