Our Vokera Maxin 24e has developed an occasional (well fairly regular
in fact) loud rattling usually when it supplies hot water. It
sometimes does is just on CH. It rattles for about 10 seconds and
then the flame goes out, then it relights and repeats. The rattling
is quite loud, as if someone is drumming on the metal case.

I guess this is a job for Vokera but I would not mind some advice on
whyether to opt for the "£160 all in fix it" or the "parts and labour"
deal.

any thoughts?

thanks,

Robert

"RobertL" wrote in message
...

Our Vokera Maxin 24e has developed an occasional (well fairly regular
in fact) loud rattling usually when it supplies hot water. It
sometimes does is just on CH. It rattles for about 10 seconds and
then the flame goes out, then it relights and repeats. The rattling
is quite loud, as if someone is drumming on the metal case.

I guess this is a job for Vokera but I would not mind some advice on
whyether to opt for the "£160 all in fix it" or the "parts and labour"
deal.

any thoughts?

thanks,

Robert

Check the fan assembly.

On Fri, 14 Nov 2008 08:31:37 -0800, RobertL wrote:

Our Vokera Maxin 24e has developed an occasional (well fairly regular in
fact) loud rattling usually when it supplies hot water. It sometimes
does is just on CH. It rattles for about 10 seconds and then the flame
goes out, then it relights and repeats. The rattling is quite loud, as
if someone is drumming on the metal case.

I guess this is a job for Vokera but I would not mind some advice on
whyether to opt for the "£160 all in fix it" or the "parts and labour"
deal.

any thoughts?

thanks,

Robert

Given the symptoms you describe I'd start with the fan. Very likely it has
worn bearing and the fan is both touching its casing and ineffective.




--
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
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

In article ,
Ed Sirett writes:
On Fri, 14 Nov 2008 08:31:37 -0800, RobertL wrote:

Our Vokera Maxin 24e has developed an occasional (well fairly regular in
fact) loud rattling usually when it supplies hot water. It sometimes
does is just on CH. It rattles for about 10 seconds and then the flame
goes out, then it relights and repeats. The rattling is quite loud, as
if someone is drumming on the metal case.

I guess this is a job for Vokera but I would not mind some advice on
whyether to opt for the "£160 all in fix it" or the "parts and labour"
deal.

any thoughts?

Given the symptoms you describe I'd start with the fan. Very likely it has
worn bearing and the fan is both touching its casing and ineffective.

Another thought might be a dodgy connection to the gas valve
(I don't know how relevant that might be on that boiler).
Might be able to tell if you can hear it after the fan
starts but before it tries lighting the main burner.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On 15 Nov, 12:39, (Andrew Gabriel) wrote:
In article ,
* * * * Ed Sirett writes:





On Fri, 14 Nov 2008 08:31:37 -0800, RobertL wrote:

Our Vokera Maxin 24e has developed an occasional (well fairly regular in
fact) *loud rattling usually when it supplies hot water. *It sometimes
does is just on CH. * It rattles for about 10 seconds and then the flame
goes out, then it relights and repeats. *The rattling is quite loud, as
if someone is drumming on the metal case.

I guess this is a job for Vokera but I would not mind some advice on
whyether to opt for the "£160 all in fix it" or the "parts and labour"
deal.

any thoughts?

Given the symptoms you describe I'd start with the fan. Very likely it has
worn bearing and the fan is both touching its casing and ineffective.

Another thought might be a dodgy connection to the gas valve
(I don't know how relevant that might be on that boiler).
Might be able to tell if you can hear it after the fan
starts but before it tries lighting the main burner.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]- Hide quoted text -

- Show quoted text -

THank you for your comments gentelmen. I think the fan is thge likely
problem. NOw I think about it, the noise has been a bit off for a few
weeks. Also, the way the flame goes out looks like a flame starved of
air. We've turned it all off until the vokera man comes.

We bought the "fix all faults fincluding this one for a year " deal,
for £300. Expensive, but it is an old boiler.

Robert

In case people are interested in what caused the rattling:

The guy from vokera came today and he found that the flue had come
apart up in the loft! This meant it was discharging flue gases into
the loft and also sucking the outlet gases back into the inlet in
again causing the flame to stutter (loudly) and go out.

He was rather critical of the original installation for not supporting
the flue sections, resulting in them gradually working loose and
separating.

Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. Ah well.

Robert

"RobertL" wrote in message
...


In case people are interested in what caused the rattling:

The guy from vokera came today and he found that the flue had come
apart up in the loft! This meant it was discharging flue gases into
the loft and also sucking the outlet gases back into the inlet in
again causing the flame to stutter (loudly) and go out.

He was rather critical of the original installation for not supporting
the flue sections, resulting in them gradually working loose and
separating.

Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. Ah well.

Robert


What length of flue is in the loft? Anything where the flue is over one
metre needs to be braced (supported). How old is the system? And, is the
original installer coming back to get his wrists slapped for nearly killing
you and your family?

Glad you've got that one sorted.

On Nov 18, 3:59*pm, "BigWallop"
wrote:
"RobertL" wrote in message

...







In case people are interested in what caused the rattling:

The guy from vokera came today and he found that the flue had come
apart up in the loft! * This meant it was discharging flue gases into
the loft and also sucking the outlet gases back into the inlet *in
again causing the flame to stutter (loudly) and go out.

He was rather critical of the original installation for not supporting
the flue sections, resulting in them gradually working loose and
separating.

Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. *Ah well.

Robert

What length of flue is in the loft? *Anything where the flue is over one
metre needs to be braced (supported). *How old is the system? *And, is the
original installer coming back to get his wrists slapped for nearly killing
you and your family?


There's about 2 metres of unsupported flue pipe going vertically up
through the loft and with a 1 metre dog leg. it's been like that for
10+ years apparently.

I assumed it was designed to stand alone like that!


Robert

"RobertL" wrote in message
...
snipped

What length of flue is in the loft? Anything where the flue is over one
metre needs to be braced (supported). How old is the system? And, is the
original installer coming back to get his wrists slapped for nearly
killing
you and your family?


There's about 2 metres of unsupported flue pipe going vertically up
through the loft and with a 1 metre dog leg. it's been like that for
10+ years apparently.

I assumed it was designed to stand alone like that!


Robert


Where the dog leg comes off, is there any support rods taking the weight at
the bends? They should be taken from close to the bends as possible, up to
the roof timber to take some of the stress off the angle connectors. Two
rods, at least, one at each end of the short dog leg section.

Will this problem happen again? Maybe in a shorter period of time because
the pipes have now been loosened off.

It's amazing how much vibration goes up the flue pipe.

"RobertL" wrote in message
...


Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. Ah well.

I would say that was money *well* spent.


Was it done by a corgi?

On Tue, 18 Nov 2008 15:59:18 +0000, BigWallop wrote:

"RobertL" wrote in message
...


In case people are interested in what caused the rattling:

The guy from vokera came today and he found that the flue had come
apart up in the loft! This meant it was discharging flue gases into
the loft and also sucking the outlet gases back into the inlet in
again causing the flame to stutter (loudly) and go out.

He was rather critical of the original installation for not supporting
the flue sections, resulting in them gradually working loose and
separating.

Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. Ah well.

Robert


What length of flue is in the loft? Anything where the flue is over one
metre needs to be braced (supported). How old is the system? And, is
the original installer coming back to get his wrists slapped for nearly
killing you and your family?

Glad you've got that one sorted.

CORGI would be very interested to slap the installers wrists or more.


--
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
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html