Keston celsius 25 failing to light
Tim Mitchell
lockout. (Red light giving two flashes, none of the 1-4 lights lit)
It only seems to have started doing it during this spell of warm
weather. You can hear the ignition circuit fire, and the "whumph" sound
as the burner lights, but then it gives up and tries again. So I presume
either it has lit but is failing to sense that it's lit, or that for
some reason it isn't sustaining the flame.
It's nearly 2 yrs old and has worked fine up to now.
Anyone got any experience of this?
--
Tim Mitchell
Andrew Gabriel
The error indication you describe isn't in my manual.
Look at the fault finding section in your manual, and
try to match it against a description.
Mine often fails to light first time (or rather lights
and immediately goes out) when it hasn't been used for
some days, but retries a minute later and relights
either second or third time. It's done this from new.
I've never been there when it's happened so I'm not
sure if there is any other obvious sign. I only know
it happens because I log the boiler's burner activity
in the computer which controls it...
May 31 07:57:30 Temperature - Downstairs 17.5
May 31 07:57:31 Output Downstairs Heating Demand ON
May 31 07:57:49 Input Boiler Burner ON
May 31 07:57:51 Input Boiler Burner OFF
May 31 07:58:21 Input Boiler Burner ON
May 31 07:58:22 Input Boiler Burner OFF
May 31 07:58:52 Input Boiler Burner ON
May 31 08:18:51 Temperature - Downstairs 18.0
May 31 08:18:53 Output Downstairs Heating Demand OFF
May 31 08:18:53 Input Boiler Burner OFF
--
Andrew Gabriel
Martin
Ours did that last year, it turned out to be a blocked filter on the gas
inlet (just before the solenoid valve inside the boiler).
The valve opens in two stages, the first stage is a for a small pilot
flame lit by the spark from the igniter, when the boiler senses that the
pilot flame is alight it opens the main valve and the boiler lights.
The blocked filter was letting enough gas through to light the pilot
flame but, as soon as the main valve opened, the gas pressure after the
filter dropped so low that, although the main burner did sometimes light
(making the "whumph" sound), it ran out of gas and went out again.
The boiler was trying to light 4 times (I think) and then locking out
and giving various different errors, making the fault hard to diagnose.
The filter was blocked with very fine carbon flakes which are,
apparently, added to the gas to seal any minor leaks in the gas main.
Hope this helps, Martin
Doctor Evil
"Andrew Gabriel" <and...@cucumber.demon.co.uk> wrote in message
news:42bfedb0$0$38044$5a6a...@news.aaisp.net.uk...
> In article <j8FB24ba...@tega.co.uk>,
> Tim Mitchell <ti...@sabretechnology.co.uk> writes:
> >My Keston Celsius 25 is occasionally failing to light and going into
> >lockout. (Red light giving two flashes, none of the 1-4 lights lit)
> >
> >It only seems to have started doing it during this spell of warm
> >weather. You can hear the ignition circuit fire, and the "whumph" sound
> >as the burner lights, but then it gives up and tries again. So I presume
> >either it has lit but is failing to sense that it's lit, or that for
> >some reason it isn't sustaining the flame.
> >
> >It's nearly 2 yrs old and has worked fine up to now.
> >
> >Anyone got any experience of this?
>
> The error indication you describe isn't in my manual.
> Look at the fault finding section in your manual, and
> try to match it against a description.
>
> Mine often fails to light first time (or rather lights
> and immediately goes out) when it hasn't been used for
> some days, but retries a minute later and relights
> either second or third time. It's done this from new.
> I've never been there when it's happened so I'm not
> sure if there is any other obvious sign. I only know
> it happens because I log the boiler's burner activity
> in the computer which controls it...
This can be crud on the sensing contacts. This can retain moisture. The
repeated tries dried this out as the fans dries it uop. Clean the probes.
Tim Mitchell
<and...@cucumber.demon.co.uk> writes
>In article <j8FB24ba...@tega.co.uk>,
> Tim Mitchell <ti...@sabretechnology.co.uk> writes:
>>My Keston Celsius 25 is occasionally failing to light and going into
>>lockout. (Red light giving two flashes, none of the 1-4 lights lit)
>>
>>It only seems to have started doing it during this spell of warm
>>weather. You can hear the ignition circuit fire, and the "whumph" sound
>>as the burner lights, but then it gives up and tries again. So I presume
>>either it has lit but is failing to sense that it's lit, or that for
>>some reason it isn't sustaining the flame.
>>
>>It's nearly 2 yrs old and has worked fine up to now.
>>
>>Anyone got any experience of this?
>
>The error indication you describe isn't in my manual.
>Look at the fault finding section in your manual, and
>try to match it against a description.
No... it isn't in my "user" manual either. According to my manual it
should be associated with one of the 1-4 lights coming on. But no other
lights are on (except the mains light), just the red light doing 2
flashes.
However the "install" manual in sec 4.10 says "If the red lockout LED
flashes twice every 2 seconds this means that the boiler has failed to
light. Turn off the user control knob off (fully anticlockwise) and wait
10 seconds. Turn ON again and wait."
but the user guide does not say this.
I happened to be standing by it when it did it last time, and the red
light started after it had tried & failed to ignite 5 times.
>
>Mine often fails to light first time (or rather lights
>and immediately goes out) when it hasn't been used for
>some days, but retries a minute later and relights
>either second or third time. It's done this from new.
>I've never been there when it's happened so I'm not
>sure if there is any other obvious sign. I only know
>it happens because I log the boiler's burner activity
>in the computer which controls it...
>
Mine has always been the same, and it only fails to light when it hasn't
been on for some time.
--
Tim Mitchell
fred
<mar...@hmgcc.gsi.gov.uk> writes
Makes good sense, mine behaved like this when the mixture was set a bit
lean (c/f blocked gas filter) and sorted itself out when it was set up with a
CO analyser that I hired - 50quid for the day tho.
--
fred
fred
>>inlet (just before the solenoid valve inside the boiler).
>>
>>The valve opens in two stages, the first stage is a for a small pilot
>>flame lit by the spark from the igniter, when the boiler senses that the
>>pilot flame is alight it opens the main valve and the boiler lights.
>>
>>The blocked filter was letting enough gas through to light the pilot
>>flame but, as soon as the main valve opened, the gas pressure after the
>>filter dropped so low that, although the main burner did sometimes light
>>(making the "whumph" sound), it ran out of gas and went out again.
>>
>>The boiler was trying to light 4 times (I think) and then locking out
>>and giving various different errors, making the fault hard to diagnose.
>>
>>The filter was blocked with very fine carbon flakes which are,
>>apparently, added to the gas to seal any minor leaks in the gas main.
>
>Makes good sense, mine behaved like this when the mixture was set a bit
>lean (c/f blocked gas filter) and sorted itself out when it was set up with a
>CO analyser that I hired - 50quid for the day tho.
one as they become hard/brittle with use & will break (bitter experience).
--
fred
Tim Mitchell
I think I'll get the guy who installed it to come and check it, he did
have a CO analyser. It only does it occasionally.
--
Tim Mitchell
Tony Bryer
> ps: don't try to reset the gap on the igniter electrode on
> anything but a new one as they become hard/brittle with use &
> will break (bitter experience).
So true :(
--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser
http://www.sda.co.uk/qsedbuk.htm
[Latest version QSEDBUK 1.10 released 4 April 2005]
Tony Bryer
> I think I'll get the guy who installed it to come and check it,
> he did have a CO analyser. It only does it occasionally.
Keston are running a summer service offer: £70+VAT fixed price
including any necessary parts: 020 8462 0262. Your guy may do
better than this of course.
Colin Brook
Mitchell <ti...@sabretechnology.co.uk> wrote
Exactly the same here. Worked OK since May 2004 and then on Saturday
failed to ignite. Same indication. Tried off/on several times and made
note to contact service agent. Then on Sunday morning it started OK and
it's been fine since then.
This error code is not recorded in the manual but I recall from
previously that it's an ignition failure irrespective of there being no
diagnostics lit.
Incidentally, since it's been discussed before; I've just received the
Summer 2005 service "special offer" - £70+VAT all inclusive. It's no
good to me because I'm on a service contract now but others might be
interested since Keston don't always seem to let all end-users know.
Regards, Colin
--
Colin Brook - Winchester (UK)
mailto:co...@cbassoc.demon.co.uk
Fax:+44(0)8701641293 Mobile:07976258703
Tim Mitchell
<to...@delme.sda.co.uk> writes
>In article <qqUjjsxg...@tega.co.uk>, Tim Mitchell wrote:
>> I think I'll get the guy who installed it to come and check it,
>> he did have a CO analyser. It only does it occasionally.
>
>Keston are running a summer service offer: £70+VAT fixed price
>including any necessary parts: 020 8462 0262. Your guy may do
>better than this of course.
>
north, but north enough for Londoners).
--
Tim Mitchell
Doctor Evil
"Tim Mitchell" <ti...@sabretechnology.co.uk> wrote in message
news:CJSZLJz6...@tega.co.uk...
Londoners think England is north.
Ed Sirett
Not on mine (it daren't 8-;).
However I suspect that there make be a loose connection on the ignition -
not enough to stop the spark but enough to disrupt the flame sensing.
Or some sort of crud on the electrode.
--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Ed Sirett
That happened on C40 install of mine, due to sulphide particles in gas the
supply.
Tony Bryer
> Is that valid anywhere in the country, cos I'm oop north. (Not
> very north, but north enough for Londoners).
According to the letter it's a 'special offer' and you have to
phone and quote your secret number. So by disclosing it I'm perhaps
liable to be dropped in a vat of condensate <g>.
It could be a regional thing depending on where their own engineers
are located and/or there are enough boilers within a finite
geographical area - they note your details then get in touch when
the engineer wants to come, often within an hour or two, so I
suspect they save up the bookings until there are a number of
customers close together.
Tim Mitchell
>> Is that valid anywhere in the country, cos I'm oop north. (Not
>> very north, but north enough for Londoners).
>
>According to the letter it's a 'special offer' and you have to
>phone and quote your secret number. So by disclosing it I'm perhaps
>liable to be dropped in a vat of condensate <g>.
>
>It could be a regional thing depending on where their own engineers
>are located and/or there are enough boilers within a finite
>geographical area - they note your details then get in touch when
>the engineer wants to come, often within an hour or two, so I
>suspect they save up the bookings until there are a number of
>customers close together.
>
(factory just down the road so all the local installers use them!)
My local installer is quoting 39 quid to service it so I will probably
see how they do with it.
--
Tim Mitchell
Tony Bryer
> Londoners think England is north.
Keston are in Bromley so crossing the Thames to Twickenham is probably
an adventure <g>