ideal icos system boiler flame failure lockout

[scoullar]

got called to a job boiler was on lockout reset boiler was ok for about a week went back same problem checked gas pressure all ok checked condensing all aspect removed plate under combustion chamber changed electrodes changed gas valve cured banging on ignition but every couple of weeks still locking out and showing flame failure fault spoke to ideal on a number of times anybody got any ideas as i have run out of ideas told customer worst boiler ever manufactured sugested to replace but they wont have none of that boiler 6 yrs old its getting embarasing now would appreciate any suggestions i havnt tried already

 

[Billy Bob Bob]

service it with a gasket set my bet is the insulation panels have started to fail because the ionization probes are shot i take it you have carried out continuity checks on the detection electrode and wiring?

 

[diamondgas]

I've had a cupl that turned out to be condensate pipe issues that wern't draining away quick enough. Might sound a strange thing to do but pour a pint or two of water down the exhaust outlet then try lighting up.... It should light straigt away unless the water has backed up

 

[quality]

I would be leaning toward the ignition transformer or internal earth connections

 

[heliotrope]

Would go with gas man on this one. Take the top off. Reckon you would find the probes 'coat hangers' failed, this can cause the
insulation panels to fall into combustion chamber.

I always FGA these and Isars
unless readings are spot on then strip down and investigate

 

[quality]

Would go with gas man on this one. Take the top off. Reckon you would find the probes 'coat hangers' failed, this can cause the
insulation panels to fall into combustion chamber.

I always FGA these and Isars
unless readings are spot on then strip down and investigate

Good post but most components as we know are made of chocolate on this boiler I was offering another experience.
Gas man knows his onions I thought I would chip in aswell

 

[scoullar]

tried that already boiler is ok for a week or so then i get that dreaded call again i just want to throw the thing in the skip

 

[scoullar]

the insulation looks fine is it one of those is hard to tell by the look ? and is it expensive if not ill try that next

 

[scoullar]

have replaced the spark generator already

 

[scoullar]

wots fga mean i think icos and isars should all be condemed the ignition banging on this one was nearly blowing the front cover off but that was down to electrodes which i have changed no more explosions

 

[scoullar]

i think your right will change insulation panels will let you know what happens dont think i will go near these again has cost me a fortune in time cant keep charging for not curing problem

 

[diamondgas]

Is the rubber sealing ring on the flue elbow still intact and in position? fga=flue gas analysis

If that's loose or jumped out all together you'd get intermittent outage too depending on the flame sensor tollerance, length the boilers on for etc...

Sure is a pain when they only go off once in a blue moon

 

[scoullar]

im sure thats ok but ill double check when i get that dreaded call no doubt !! ill be back !! i sound like sylvester stallone lol

 

[scoullar]

have another problem with a pott performa 24 tap running boiler ignite for about 30 secs and cuts out and ignites again after about 2 mins havnt done any checks yet going tomorrow im thinking diverter or hw sensor or hw plate which is most likely in your experience

 

[armourer]

All of the above mate.
Oh by the way "I'll be back" Is Arnold Swarzenegger not Sly:wink:

 

[scoullar]

ok smart arse id come bak as rocky bigger fan club done everything else cant be much more just my luk the only thing left to do anyone who has had this boiler installed should out it at the first breakdown will never go near another been a nightmare it wouldnt be so bad if ideal could giv more help but i suppose with symptons could be so many things should have outlawed from day 1 ive never come across such a dangerous boiler they should be all recalled like the car manufacturers do thanks for the reply anyway cant beat the worcester dont mention the bosche as john cleese would say

 

[scoullar]

Good post but most components as we know are made of chocolate on this boiler I was offering another experience.
Gas man knows his onions I thought I would chip in aswell

your right was designed by wiily wonka or surname spelt slightly different

 

[scoullar]

got fed up of this job called in ideal he wasnt sure what was causing problem he said he aint taking no chances of a recall so he changed everything i havent heard back from the customer so alls good the only downfall i still dont know what the problem was

 

[Unregistered]

This thread is now about 4 years old but should anyone stumble across it with the same intermittent flame lockout problem then this is what I have found....
The pcb is badly positioned with respect to the front cover and if the harness that plugs in on the front centre of the pcb isn't carefully routed then the outer cover can press against it.
This may not cause a problem straight away but with continued use the vibration caused when the boiler kicks in and out may be enough just to break the contacts at the connector which is being pressed down by the outer cover. The result being the voltage sent out by the pcb when the boiler tries to fire up doesn't actually get to the gas valve and so won't open to allow the gas through for ignition.
This will be shown by the boiler light coming on as if it's trying to work and then the L F Flashing fault code a few minutes later.
Only fix is to make sure this harness is well clear of the outer cover and that it's connector is firmly fitted in the pcb.
Hope this helps.
I fixed this fault without replacing any components 18 months ago and it hasn't come back.

 

[Dotty]

Don't you just love dangerous cretins!

Thread moved.

 

[IDCHAPPY]

I'd hope most folks had ripped these POS out by now :lol:

 

[townfanjon]

Lol, serviced two this week pal , loads of them round here.

 

[IDCHAPPY]

I got one hanging on by it's fingertips that's ready for a vogue

 

[goz666]

Funny reading this cos I did one today same problem LF failure, checked all usuals then found the wiring from the flame rectification probe back to the molex connector was brittle and disintegrated. Replaced, job done !!

 

[arran197]

The flame rectification lead will be a problem now, they are getting to that age. They also start to display another error code which means flame rectification fault. I've not had the harness fail but have had numerous other faults that are common. Blocked condense trap and pipework is the most common. Followed closely by the ignition and flame electrodes. Although the insulation pads pins are an issue, they rarely get to the stage of falling in. They do need to be checked and replaced though in any case.