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Plumber Help

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Please help we are freeeeeeeeeeeeezing. I've recently moved house and the combi boiler suddenly stopped working yesterday and flashes up the fault L-F (ignition failure). I've tried to re-set it… Read More
mrsj2008 Avatar
7y, 7m agoPosted 7 years, 7 months ago
Please help we are freeeeeeeeeeeeezing.

I've recently moved house and the combi boiler suddenly stopped working yesterday and flashes up the fault L-F (ignition failure).

I've tried to re-set it countless times, rang the number on the boiler and it's a government funded home/warm front scheme meaning they can't come out for upto 6 weeks (also told me it's not applicable to me as i'm not on benefits).

Called my usual plumber and he can't come out till Tuesday. Rang another who came to look at it but said he's never worked on this type of boiler before so didn't want to take a chance trying to fit it (he didn't charge us for this, thankfully).

It's a Isar Ideal Boiler ref HE24, HE30, HE35 (numbers taken off manual as no numbers on the boiler itself).

Any suggestions gratefully received :)
mrsj2008 Avatar
7y, 7m agoPosted 7 years, 7 months ago
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[mod]#1
Ring round.....they'll be plenty of plumbers/gas fitters that will know what they are doing but it will probably be at a premium today.
#2
Didn't it used to be possible to sign up for the British Gas homecare thingy at £15 a month and they'd come out and fix your boiler this time as part of the deal? Could be wrong on this.
#3
try turning up the pressure - our heating often does that when the pressure has dropped, once with boost it up it works
#4
Evil_monkey
Didn't it used to be possible to sign up for the British Gas homecare thingy at £15 a month and they'd come out and fix your boiler this time as part of the deal? Could be wrong on this.


Yes...I've got EON homecare & they come out straight away :thumbsup:
but if the OP hasn't got cover its going to cost :thinking:
#5
Try turning the power off to the boiler first,switch back on , then go through the reset sequence again.if this does not work post make of boiler and model I'm a gas engineer so hope this helps
#6
wendy56
Yes...I've got EON homecare & they come out straight away :thumbsup:
but if the OP hasn't got cover its going to cost :thinking:


I appreciate she might not have cover now but what I meant (and it's hard to explain here) was she could give British Gas a call and have a conversation along the lines of "Hi, my boiler's knackered. If I sign up to the homecare today will you come out and fix it".
#7
Just checked the boiler and the filling loop is connected but the manual doesn't tell me how to do it!!!
#8
Evil_monkey
I appreciate she might not have cover now but what I meant (and it's hard to explain here) was she could give British Gas a call and have a conversation along the lines of "Hi, my boiler's knackered. If I sign up to the homecare today will you come out and fix it".


Good thinking :thumbsup:
#9
Hi,

thanks, just turned it off again but no joy. It's a HE24 boiler.

Just been on British Gas website and they'd charge £168 - doesn't say if they'll come out.
#10
Evil_monkey
I appreciate she might not have cover now but what I meant (and it's hard to explain here) was she could give British Gas a call and have a conversation along the lines of "Hi, my boiler's knackered. If I sign up to the homecare today will you come out and fix it".


Unfortunately due to experience lol they wont come out on this scheme if you have an existing problem - to get on that scheme they check out your boiler first to make sure its in perfect working order.

OP i really sympathise with you but see that a plumber has joined the thread so fingers crossed u will all soon be warm again
banned#11
Evil_monkey;7206322
I appreciate she might not have cover now but what I meant (and it's hard to explain here) was she could give British Gas a call and have a conversation along the lines of "Hi, my boiler's knackered. If I sign up to the homecare today will you come out and fix it".

Of course they wont come out! :w00t:

You have to have these types of cover in place BEFORE the boiler packs in. BG for example insist on an inspection before cover commences.
#12
Tried looking at the manufacturer's website?

Link to the fault assistant

Or try calling their "dedicated technical helpline" for consumers: 01482 498660
banned#13
Always worth Googling first as many manuals are available on-line.

http://www.idealboilers.com/docs/pdf/isar_he_manual.pdf

Look at page 52. Code L - F = Flame detection error.

There's a flow chart on the next page for fault diagnosis.

Source:-

http://myreader.co.uk/msg/1391142459.aspx
banned#14
Note. If the boiler fails to light after 3 attempts the fault code “LF”
will be displayed.
Press the select button (C) for greater than 3 seconds then release.
The boiler will repeat the ignition sequence. If the boiler still fails to
light consult a CORGI registered installer or in IE a competent
person.
#15
Going through all the links and suggestions to reset it's shows that the error code swops to a 'd' which means it's set into working mode. But it doesn't tell me what to do from here!
#16
http://www.ultimatehandyman.co.uk/TOPPING_UP_A_COMBI_BOILER.htm
if it is low pressure thats causing it
this might be useful there is a video at the bottom as well
#17
Thank you everyone for your help. Please keep it coming as it's not fixed yet. I'm off now to do my good deed for the day (helping out a charity event) so will try the other tips when I get in later :thumbsup:
#18
I have one of these and i have done several repairs myself (i know i'm not meant to, but with reasonable diy knowledge it isnt hard to replace some parts) I had this fault and it was caused by a build up of moisture draining back from a faulty flue and dripping onto the main control unit causing it to fail. the quickest, easiest and ultimately cheapest cure was to replace the control unit, which is what an engineer will probably do anyway, so save the wait and the call out fee (unless it is under warranty which i doubt). Look here and scroll down to the exploded view on page 8. it is part 36 and it is easy to replace. BUT do not attempt unless you feel competant and isolate power before starting. if you want to attempt it yourself, pm me and i'll run you through. You should be able to get a replacement PCB unit from the likes of Plumbase or online, here ring around tomorrow but from memory it was over £100. have you checked the fault flow chart 80 and 81 first?
#19
One little thing you can check as some boilers I.E.bosch worcester wont ignite if your pressure is under one bar, thats includes the central heating.

You will see a pressure gauge whats it showing?
And i not calling anyone daft as we have all done it but is the gas on to the boiler (kids can knock it off if its low down)

Can you see the hole where the pilot flame is, is there any sparking when you are trying to turn it on
#20
Still no joy. Tried sorting the pressure by turning the silver knobs and it leaked a bit of water so screwed it back. Please see pics below. Just off to my friend's for a shower. Hopefully someone might be able to give me some more advice?

Also, it's turned itself into running in standard mode, does anyone know how to change this?

[IMG]http://i278.photobucket.com/albums/kk90/stinkymcwinky/boiler/xmas2009037.jpg[/IMG]
#21
[IMG]http://i278.photobucket.com/albums/kk90/stinkymcwinky/boiler/xmas2009034.jpg[/IMG]
#22
it's not a pressure issue
#23
Mrsj2008....I wish you good luck!

My boiler went on the blink 2 weeks ago today, I have had the plumbers out twice already and each time it's something different and they have to order the parts! I am sitting here with my winter coat on freezing cold I have no fire either... I am at a loss as to what to do but tokeep trying with another plumber.
#24
Yes it is pressure your gauge is showing under 1bar, looking at the bottom picture you see the shiny loop pipe open the little shut offs with a screwdriver/knife (both of them ether side of the loop) untill the pressure reaches 1.2 to 1.3 bar then shut off fast, try that
#25
bashy it isn't low enough to cause a fault.
#26
pinkleponkle
bashy it isn't low enough to cause a fault.


It is some boilers will not work if pressure is under 1bar i know i have fixed loads.
#27
Well it's what I do for a living and they start moaning at 0.5bar, but she can whack her back up to 1.5bar as it wont hurt, but it wont fix the issue either. I have never come across a boiler that shuts down if it dips under 1bar
#28
Looking at her pic again her boiler is lit she just has no heating she may find that there is hot water but no heating, I not saying this will fix the fault but there are some makes of boilers that will not work if under 1bar. (or there abouts the gauge and electronics are not always spot on if you follow me) give a take abit around 1bar.

The gauge looks around 0.8 but hard to make it out, the main board could be slighty out and just hit the shut off point

Its worth a try anyway
#29
thanks guys, just off with the screwdriver now.......

............ Pressure back up, boiler still not firing up :(
#30
I'm pretty sure the problem is the PCB. I had the same thing on the same boiler. I know it's an expensive part and we'd all rather not have the expense but from my experience these boilers are really pernickety and once there's a fault they go into lock-down and nothing will work till you replace the offending part. It is definitely 100% not a water pressure issue. I know its a silly question, but are you sure the gas is on ok? sorry to ask! What part of the country are you coz if by coincidence you are somewhere near me I have a spare PCB that I procured and I could lend it to you to try.
#31
Hiya,

When the plumber came out he checked to make sure the gas was still connected so gonna say yes to that question. We have nothing else in the house connected to gas that I could try.

I'm in the northwest (border of Lancashire/Merseyside).

ps. It's around £135. Do you reckon my best bet is to sign up with British Gas boiler contract £165 for the year?
#32
do you feel comfortable having a go at opening the boiler? sadly i'm in SE England.
#33
yep, hubby now here with his trust screwdriver lol.
#34
ok, turn power off to boiler and undo the small philips screw in middle underneath that releases front cover. It then slides forward from the bottom and upwards. ok?
#35
Looking at the picture it seems as if your condense pipe is running towards the boiler (not away). It's the white plastic pipe in your picture. This could well be the problem as it would interfere with the ignition if the burner is wet. See if you can move it down to drain any condense out.
#36
Shall go up now. Hubby did mention that surely the pipe should tip down to allow for drainage!

Cover off
#37
yes it should drain away
#38
mrsj2008
Shall go up now. Hubby did mention that surely the pipe should tip down to allow for drainage!


I had a blocked condense pipe on a Vaillant EcoTec that caused this exact problem.
#39
once the front cover is off does it look wet inside from the condense not draining?
banned#40
dont bg still do the one off payment thing, where you pay £70 and fix it for that, or is that area dependant, i have that boiler and manual although i cant really help. i agree about the white pipe, mine just goes straight down, no bends, but that doesnt look like its tilted down enough, what is the gauge at the bottom for? sorry its the caps, my bad eyesight :oops:

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