Hi I have an a.o. smith oil fired boiler in my home... I went too start it up this week it goes through the initial cycle then shuts down... flame detector shuts off... I have about 60 gals of fuel oil in the tank and changed the inline filter but same results... what can it be?:confused:

Does the pilot light ignite?

Yes it ignites and runs for a minute... the flame detector light goes out and the motor shuts down

There is a flame sensor that reads if the pilot light is ignited. It might just be dirty. It looks like a small metal probe that should be pointed into the flame. Try cleaning it off.

Where can that be located?

It should be located just above the burner. There should be an access door where you can see in to the burner.

OK great ty ill try that

I have a natural gas fired heater so I am not positive.