Help please Worcester 15/19 Heatslave

[Sage1]

Can someone help please.We have an intermittent fault with our boiler.Excuse my ignorance but I will try my best to explain.
A strong smell of oil occurs followed by lockout.You can then reset the button and all as well for a while.I have had the heating engineer along twice and on the first occasion he couldnt find anything.
He came along on Monday after it happened a few times over the weekend and replaced the clear box(where the reset button is)as this wasnt lighting up on loclout and he thought it wasnt sending the correct message to the boiler.He also said the boiler wasnt switching off when supposed to and pointed to a black lead to the left.Sorry for my vagueness.
well all ok yesterday but woke this morning to a strong smell of oil again and I knew it would lock out as soon as I turned the heating on and lo and behold it happened virtually straightaway.Does anyone have any ideas he is calling again this pm.
The boiler does not have to be in use(e g just water light on upon the panel)as per this morning for this to happen for example..Lockout is always preceded by strong smell of oil though.
Any thoughts please ...Damsel in distress

 

[dcawkwell]

Sounds more like a wearing oil pump drive shaft coupling.
Not a smell of oil but more likely melting plastic.

I would suggest new nozzle, check the drive shaft coupling.
Check oil pressures and emissions.

Another possibility is solenoid coil/valve. But check the others first.

Did your oil engineer do this? If not get someone else.

 

[Sage1]

Thank you for the reply .I am not sure if he checked these on this occasion.

He did say there were a few drops of oil in boiler.

i have used the same engineer for years and he has gradually replaced most of the parts bar one.

Would should I ask him?.Sorry to appear so dumd

 

[dcawkwell]

He needs to check the pressure the pump is supplying the burner.
He will need his oil pressure guage out for that.
He should then be able to tell you the pressure
that the burner is running at. Like 115psi.
He needs to meausre the flue emissions CO2 % he will
need his flue gas analyser out for that. He should then be able
to tell you the % approx 11%

 

[Sage1]

Thank you.

I appreciate you taking the time to reply

 

[Bosswhite]

The most obvious, check Oil Level first. if its low there could be sludge in tank, (New Filter and drain off some oil) Basic Service work.

We had the problem last year condensation in Tank settled in the Filter and froze overnight, by mid morning it had unfroze and Boiler was working again, (a couple of simple faults that stops the Boiler from working.)

 

[Sage1]

Thank you also Boss white.
Apparently tank about half full.He checked the filter prior to Christmas and took out the water that had accumulated in the tank.

Its such a pain .The smell of oil is nauseating.

 

[Burnerman]

When you say oil smell, are you talking about raw fuel, or burnt oil smell, with smoke?
I don't like the idea of raw fuel entering your boiler without combustion as if it does decide to light then there could be danger.
The lead the guy is referring to is probably the photocell wire - this device looks for a flame and if it sees one, it keeps the fuel supply running. It could well be faulty!
Your boiler has a simple burner (B9) and diagnosis should be quite simple.
John

 

[Sage1]

Hello Burnerman .Well there has been no evidence of smoke.
He has been along again this pm and replaced another black part (type EB1?) from around the area of the lock out button.he says possibly fuel coming through but not always being ignited if that makes sense to you.
He is normally pretty good.He didnt say there was any sign of significant leakage in Boiler.

Does what he has done now seem reasonable?

 

[Burnerman]

He has replaced something called the ignition transformer - the bit that produces a high voltage spark to ignite (hopefully) the spray of oil.
He may well be on the right track, and the transformer sits right behind that control box with the lockout light.....Satronic TF 832-3.
When you ask the burner for some action, you should hear the motor start up...this is connected directly to a fan that forces fresh air into the chimney. The ignition spark occurs at the same time. This happens for a few seconds and then electronically the oil supply from the pump (marked BFP 41 L3 more than likely) is switched on...you can hear the roar of ignition.
Perhaps the spark isn't occurring, so the oil passes for a short time before lock out.
The spark can be checked with the burner withdrawn from the boiler, but you need to know whats what for that one!
So, the million dollar question is....are you warm now?
John

 

[Terrywookfit]

Sounds good .
The EB1 often gives intermittent ignition problems.

 

[Sage1]

Well John.
The heating is on so progress.Im just praying this works.The boiler has been a nightmare since September.
Thank you so much for taking the time to reply.I will keep you posted.

Regards

 

[oilhead]

Oil smells on this boiler often emanate from a leaking isolation valve on the bulkhead of the burner box where the oil line passes from the solid pipe to the flexi. I've replaced 5 so far this year, and it is noticeable when the cover is removed to press the reset. Check for signs of leakage around the joint in the case, it doesn't take much to smell when you are down by the burner. Also, when you have reset the burner, are you replacing the cover properly? If not, you may be getting too much air and causing flame detachment.

 

[Burnerman]

Aye, I've had a few of those red taps too - bloomin' expensive for what they are.
I'd urge Sage1 to feel the flexy pipe from the tap to the pump as well in case thats weeping.
I've also had a few of the BFP41's leaking from the pressure adjustment screw too.....
Dead simple and sweet burner, the B9.
John

 

[Burnerman]

Sounds good .
The EB1 often gives intermittent ignition problems.

Only had a couple with HT lead issues....seen some rare bulges on the EB1 though
John