Potterton Lynx Combi Boiler
paul.olivier
Remove NOSPAM.
I have a potterton lynx boiler which has started to play up with what i
think is an ignition fault. when the boiler ignites after a short time
the boilers burner cuts out, sometimes it does not light at all and
sometimes it can work for hours and then just stop. When the burners go
out the pump is still running and the demand led is lit, turning the hot
tap on does not re-ignite it either. The ignition pcb is numbered
407687. If some one could give me an idea as to the price for a
replacement board or any other ideas i would appreciate it.
Thanks Paul
Ewan MacIntyre
In article <34D80742...@NOSPAMdiamond.co.uk>,
paul.olivier <paul.o...@diamond.co.uk> wrote:
>I have a potterton lynx boiler which has started to play up with what i
>think is an ignition fault. when the boiler ignites after a short time
>the boilers burner cuts out, sometimes it does not light at all and
>sometimes it can work for hours and then just stop. When the burners go
>out the pump is still running and the demand led is lit, turning the hot
>tap on does not re-ignite it either.
Could this be a faulty thermocouple (device which tells the
boiler the gas is burning, so it knows to keep the gas
flowing). AFAIK only a few quid for a new one and a 'normal'
fault.
I'd only suspect the board well after you've checked it's
not something simple that's broken.
Ewan
Julie Loaker
I've had lots of trouble from my Potterton Lynx too, the ignition is
intermittent and unreliable. Potterton don't want to touch it, and I
can't find any local plumbers who will touch them either.
If you find a helpful source of info I'd be very interested!
Jools
Michael Lake
The message <34D80742...@NOSPAMdiamond.co.uk>
from "paul.olivier" <paul.o...@diamond.co.uk> contains these words:
> Remove NOSPAM.
> I have a potterton lynx boiler which has started to play up with what i
> think is an ignition fault. when the boiler ignites after a short time
> the boilers burner cuts out, sometimes it does not light at all and
> sometimes it can work for hours and then just stop. When the burners go
> out the pump is still running and the demand led is lit, turning the hot
> tap on does not re-ignite it either. The ignition pcb is numbered
> 407687. If some one could give me an idea as to the price for a
> replacement board or any other ideas i would appreciate it.
> Thanks Paul
Hi Paul
I work for BG & had a few headaches with Lynx boilers,and you're
right local corgi guys don't want to know.
Firstly check the two electrodes on the burner,the left is the
ignition one ,it tends to be loose & the metal core slips down
reducing the spark gap thus giving intermittant lighting or not at
all.Failing this the two circuit boards that give the most trouble
are the ignition & full sequence boards.I carry all these on my van &
try them when I have sinilar problems as yours,I know you cannot buy
these on the off chance.
If yours lights up sometimes then there can't be alot wrong,hope this
helps a little.If stuck BG will always come & repair the lynx for
you,and only charge for the parts used as corgi guys once they buy a
part like pcb's they cannot take them back if not needed,whereas we
can return unwanted parts back to our main stores.
Mick
Whitley Bay
()
>Remove NOSPAM.
>
>I have a potterton lynx boiler which has started to play up with what i
>think is an ignition fault. when the boiler ignites after a short time
>the boilers burner cuts out, sometimes it does not light at all and
>sometimes it can work for hours and then just stop. When the burners go
>out the pump is still running and the demand led is lit, turning the hot
>tap on does not re-ignite it either. The ignition pcb is numbered
>407687. If some one could give me an idea as to the price for a
>replacement board or any other ideas i would appreciate it.
>
>Thanks Paul
>
Hi Paul (and others!!)..
The Potterton Lynx is not really a boiler for the DIYer due to its
relative complexity. Do not assume that just because there is an
ignition problem that it isthe ignition PCB as you will notice that
there are a number of other PCB's all plugged into a motherboard. The
Lynx is a very nice boiler when it is working but when it isnt,it
really needs specialist diagnosis as it is very easy to be misled. Its
been a while since i've played with a Lynx and there has been a new
model since the original one.There is no permanent pilot,no
thermocouple or anything as crude as that. Initial ignition and flame
detection is via flame rectification. Your problem could also be
caused by fan failure or failure to detect the fan properly. The fan
is detected via a positive temp coefficient detector located in the
fan outlet casing. It is over on the top at the left hand side and is
a tubular device housing a fine wire loop and a component soldered
across the loop. The flow of air over the device causes a temperature
difference and so indicates flow. Because of the complexity of this
appliance and the cost of parts i can only recommend that you contact
Potterton who have their own service network and get it diagnosed and
sorted properly.
REMOVE NOSPAM FROM ADDRESS TO REPLY****
Remember:you gotta give a little to get a little.
Matthew Marks
In article <34d9041f...@news.prestel.co.uk>,
strangle...@geocities.com (()) writes:
> The Potterton Lynx is not really a boiler for the DIYer due to its
> relative complexity. Do not assume that just because there is an
> ignition problem that it isthe ignition PCB as you will notice that
> there are a number of other PCB's all plugged into a motherboard. The
> Lynx is a very nice boiler when it is working but when it isnt,it
> really needs specialist diagnosis as it is very easy to be misled. Its
> been a while since i've played with a Lynx and there has been a new
> model since the original one.There is no permanent pilot,no
> thermocouple or anything as crude as that. Initial ignition and flame
> detection is via flame rectification.
My old Potterton Netaheat has no permanent pilot, and flame detection via
the ignition electrode. Its electronics are all on a small PCB - why does
this Lynx thing have to be so complicated? The only disadvantage with
the Netaheat is the two loud clicks of pilot and main solenoids when it
ignites, but I expect other boilers suffer from this too.
Oh, and a good old pressure switch detects that the fan is operating.
--
Matthew @rd.bbc.co.uk My opinions, not Auntie's *RETURN ADDRESS SPAMPROOFED*
ge...@cetltd.demon.co.uk
In article <6bsa3e$a...@bbcnews.rd.bbc.co.uk>,
nob...@rd.bbc.co.uk (Matthew Marks) wrote:
>
> In article <34d9041f...@news.prestel.co.uk>,
> strangle...@geocities.com (()) writes:
> > The Potterton Lynx is not really a boiler for the DIYer due to its
> > relative complexity. Do not assume that just because there is an
> > ignition problem that it isthe ignition PCB as you will notice that
> > there are a number of other PCB's all plugged into a motherboard.
provide a reconditioning service. For example on the Lynx: 407685-£26.00,
407686-£13.00, 407687-16.30. For engineers who are not sure which pcb is
defect, we offer a special price for the 407685/6/7 set of £40.00. All with
12 month guarantee of course. We are established and provide a professional
service We are currently in the process of moving so if you're interested but
don't contact me by the end of the month, my mobile number is 0468 760009
P.S. this is not a spam, just a personal reply
-----== Posted via Deja News, The Leader in Internet Discussion ==-----
http://www.dejanews.com/ Now offering spam-free web-based newsreading
geoff
We recondition PCBs fans, time clocks and actuators (and descale heat
exchangers) for central heating boilers. Compare the prices with new
items. We also give a 12 month guarantee. We have been trading for five
years and have built up a good reputation and provide a professional
service.
See our web page for details - www.cetltd.demon.co.uk
--
geoff
()
On 11 Feb 1998 13:46:22 GMT, nob...@rd.bbc.co.uk (Matthew Marks)
wrote:
>In article <34d9041f...@news.prestel.co.uk>,
> strangle...@geocities.com (()) writes:
>> The Potterton Lynx is not really a boiler for the DIYer due to its
>> relative complexity. Do not assume that just because there is an
SNIPPETY SNIP>>
>
>My old Potterton Netaheat has no permanent pilot, and flame detection via
>the ignition electrode. Its electronics are all on a small PCB - why does
>this Lynx thing have to be so complicated? The only disadvantage with
God only knows,,I mean,its only a fanned flued combi when all said and
done. It just does the same thing as other FF combi's only it does
some of it in a whole new way!!. It also has pretty flickery lights on
the front so that it looks tricky as well as being tricky. I beleive
you can pick up the BBC World Service on a Potterton Lynx on a clear
day.
>the Netaheat is the two loud clicks of pilot and main solenoids when it
>ignites, but I expect other boilers suffer from this too.
I have mended some that made one little click(spark)and then one
massive bang followed by a thud as it hits the floor. You can rest
assured though that this is a rare occurence.
>
>Oh, and a good old pressure switch detects that the fan is operating.
>
If only they were all that simple,,sigh.
>--
>Matthew @rd.bbc.co.uk My opinions, not Auntie's *RETURN ADDRESS SPAMPROOFED*
REMOVE NOSPAM FROM ADDRESS TO REPLY****
geoff
In article <34e39caf...@news.prestel.co.uk>, () <stranglerz.nospam@
geocities.com> writes
The Lynx electronics is more complicated because it is a modulating
boiler i.e. the modulating valve adjusts the output to (in theory)
compensate for different conditions (e.g someone flushing the toilet,
tap half on etc). This is performed by the modulation board (407686),
the main board (407685) basically provides the power supply , drives the
lights and routes the electricity. The sequence board (407687) is
roughly comparable to the netaheat but has circuitry detect the air flow
sensor. That is why it is more complicated - for what it's worth
see us at www.cetltd.demon.co.uk
>REMOVE NOSPAM FROM ADDRESS TO REPLY****
>Remember:you gotta give a little to get a little.
--
geoff
Paul Murr
>We recondition PCBs fans, time clocks and actuators (and descale
>heat exchangers) for central heating boilers. Compare the prices
>with new items. We also give a 12 month guarantee. We have been
>trading for five years and have built up a good reputation and
>provide a professional service.
Yeah like i believe that. Ive been working in this trade for long
enough to know that 12 month GT does'nt exist on boiler parts.
Wookey
geoff wrote:
>
> We recondition PCBs fans, time clocks and actuators (and descale heat
> exchangers) for central heating boilers. Compare the prices with new
> items. We also give a 12 month guarantee. We have been trading for five
> years and have built up a good reputation and provide a professional
> service.
>
This sounds marvelous - an entry for FAQ6 I think. I think we might let
geoff off the 'no advertising' ban so long as he sticks to answering
specific points, and doesn't go plugging his company over and over. He's
done OK so far...
--
Wookey
--
Newmarket Rd CAMBRIDGE, CB5 8RS, UK.
geoff
In article <34EF52...@bigboot.com>, Wookey <woo...@bigboot.com>
writes
few plugs, I wasn't aware of the non-advertising status. Still you know
where I am and if anyone does have any specific questions, I might be in
a unique position to help them (where else would you find anyone like me
with a good understanding of the electronics in boilers ??? - keep in
touch, I won't plug again
--
geoff
Matthew Marks
In article <+67HpBAs...@cetltd.demon.co.uk>,
geoff <ge...@cetltd.demon.co.uk> writes:
>>
> Yes, and thanks for the pers. email, I just found UK.diy and put in a
> few plugs, I wasn't aware of the non-advertising status.
It is a basic rule of netiquette that you should lurk in a newsgroup long
enough to find out what it's about before posting. In this case, you would
only have to lurk 10 days to see the FAQ posted. Part 1 clearly states that
this group is not a place to advertise commercially.
In addition, anyone who has used Usenet should realise that *by default*
advertising is *not* welcome in newsgroups unless it is specifically mentioned.
In fact, you stated earlier that a posting of yours was "not a spam", so you
must be well aware of this.
Therefore, I find your statement above rather difficult to believe, but if you
are genuinely not going to pester us with irrelevant advertising, and if you
offer a genuine service which can be independently verified, then there may
be justification for including you in FAQ6. This is the only place where
commercialism comes into this group, and it is done in this way to ensure that
the level of noise is kept to a minimum.
> (where else would you find anyone like me
> with a good understanding of the electronics in boilers ???
Stay a little longer in this group - you will be surprised.
> I won't plug again
--
geoff
In article <6d3v22$c...@bbcnews.rd.bbc.co.uk>, Matthew Marks
<nob...@rd.bbc.co.uk> writes
>In article <+67HpBAs...@cetltd.demon.co.uk>,
> geoff <ge...@cetltd.demon.co.uk> writes:
>>>
>> Yes, and thanks for the pers. email, I just found UK.diy and put in a
>> few plugs, I wasn't aware of the non-advertising status.
>
>It is a basic rule of netiquette that you should lurk in a newsgroup long
>enough to find out what it's about before posting.
See below ---¬
>In this case, you would
>only have to lurk 10 days to see the FAQ posted. Part 1 clearly states that
>this group is not a place to advertise commercially.
>
>In addition, anyone who has used Usenet should realise that *by default*
>advertising is *not* welcome in newsgroups unless it is specifically mentioned.
>In fact, you stated earlier that a posting of yours was "not a spam", so you
>must be well aware of this.
>
>Therefore, I find your statement above rather difficult to believe, but if you
>are genuinely not going to pester us with irrelevant advertising, and if you
>offer a genuine service which can be independently verified, then there may
>be justification for including you in FAQ6. This is the only place where
>commercialism comes into this group, and it is done in this way to ensure that
>the level of noise is kept to a minimum.
>
>> (where else would you find anyone like me
>> with a good understanding of the electronics in boilers ???
>
>Stay a little longer in this group - you will be surprised.
I'm waiting
>
>> I won't plug again
>
reply
-----
I didn't actually reply to uk.d-i-y, I answered a letter I found in deja
news (concerning Potterton Lynx pcbs), unaware that it would be posted
to the newsgroup. I then decided to look at the newsgroup and found that
there were a number of people with problems relevant to what I do (i.e.
recondition pcbs and fans for boilers) and I thought I would make my
presence known to anyone who might want to make use of us.
The bottom line is I'm sorry if I've offended anyone, but If you want to
go and pay over the odds for a new fan/pcb, go ahead - otherwise we are
here with a serious alternative.
--
geoff