Bentone oil burner stopping randomly

[xtremem23]

Stopping randomly most likely isnt a true statement to make obviously its not random but in fact theres a conditions that is causing my burner to "lockout"

Doesnt happening when starting, it will run,heat rads in two 2 zones along with water and then it just locks out and i have to reset it,it then goes for another while and the same thing will happen or either we switcg it off and then the whole things repeats.

All was fine until we ran out of oil a few days back, once oil was in tank i bled system at inline filter and at burner.

Anyone any ideas ?

I was going to take it apart to see if by running out of oil has dragged some dirt into the oil pump etc. But because it goes for quite a while at time rhis too seems fruitless.

Help...

 

[oilboffin]

Try the coil on the oil pump this sound like the fault which suggests it's faulty.Bob

 

[oilhead]

Try the coil on the oil pump this sound like the fault which suggests it's faulty.Bob

+1

 

[xtremem23]

When you say coil,do youmean the ignition transformer ?

 

[Burnerman]

Its the plastic encapsulated coil on top of the oil pump.....held by a knurled nut and a plug in cable connection.
John

 

[JimCrow]

 

[Mike2007]

Also possible motor capacitor failing once heated up. But first choice is the pump solenoid coil

 

[xtremem23]

I have replaced the coil today and turned on the heating for upstairs, we have zonal heating, downstairs, upstairs and water.

Burner fired up ran for approx 20 then locked out.

Resetting using the button and burner will run fine again

Happening more often than not now.

Any other ideas what it might be ?

Can i test the capicitor with a multi meter ?

Is it a zonal issue perhaps ?

The coil i received has a different number on it,wud this matter ?

One i took off had 071N0010 and the one i installed was 071N0808, ordered from amazon and it said it was the same but had an higher/lower ambient operating threshold.

Any help would be great

 

[snb]

You said you had an oil delivery. Most likely suit been dragged through or filter/s blocked

 

[xtremem23]

Yes,thats correct.

Inline filter bowl was cleaned etc.

Do you think its dirt in the pump filter ?

You'd near think it was airlocking, like after running out of oil when it needs bled.

Ive done this numerous times though.

Just had it serviced to hoping the the engineer could identify the issue but as its intermittent he could not replicate the fault and all pressures/mixtures etc. were correct as per spec.

To change/clean the filter in the pump do i need to turn off oil supply to it and then re-bleed after again

 

[snb]

if the filters are clen and you have changed the pump coil then i would be looking at the ignition transformer starting to fail or the control unit. transformer more likely though

 

[xtremem23]

In my previous post i mentioned about the coil that i put on being different to the one that i took off,would this make a difference ?

It just seems to happen after initial start up in the morning say, after hitting reset it will run fine throughout the day if on and then once its been off over night for example the same issue will occur all over again.

Any thoughts ?

 

[oilhead]

What boiler is this on? A Wallstar perhaps. What model Bentone is it? What model of pump is it?

 

[xtremem23]

Sterling st40 with danfoss pump

 

[oilhead]

As SNB says, suspect the transformer.