Ideal boiler HE 18

[Septimus]

Hi there . I would be grateful for any advice i can get on this worrying problem .
My boiler frequently fails with a LF code . It usualy lights ok when you reset .

Lately though it lights with such a bang that it is very frightening .
I am about to phone an engineer to have it looked at but the last time i done this a so called boiler engineer had it in bits and scratching his head walked away . On that occasion it was blocked on the outlet side. A proper engineer fixed it in 5 mins by sticking his finger into the boiler after removing the drain sump and removing 3/4 pint of water and grey sludge . it worked fine for about a year..
I just need a little advice as i hate part changers who think i am going to pay for there on the job training .
I just would like to have a little knowlege so that i know if he starts changing multiple parts i am at least a little aware of what is going on as some so called engineers just make it up as they go along .
I have no problem paying a good tradesmen a good days wage i just hate paying guys who have tied there horse to my front fence on the way in
PS sadly the good engineer i called last time has moved away .
Any advice gratefully appreciated .

 

[idealnumber1]

you will probably have the same fault as last time

 

[Septimus]

hi ther and thanks for reply . No the problem is different . i have checked that the sump was empty and clear and that teh drain pipe is clear .
Thats as far as i will take it . There is no gurgling this time also . It just goes off with a loud whoosh or bang when it lights .. if you ar in teh room when it lights ..it can be very scary .

 

[Garfeild]

I would be looking at the ignition probe and/or spark generator,also checking that gas pressure ok.

 

[Septimus]

hi garfield

thanks for that . I made a few calls today and you are the second person who has suggested the spark generator system etc. sorry if terminoligy is off . Handy info and as explained in original post its just so i am aware of remedies in case i get a parts changer . dont mind paying for the right fix.
Some of the cases you read about on the forum are exactly what i am trying to avoid . Thanks again for your time in replying and knowledge

 

[idealnumber1]

bent or corroded ign probe

 

[Septimus]

thanks ideal
appreciated

 

[hym]

has the boiler had the insulation retention update. You