Hi,

I wonder if anyone could offer some advice on a problem I am having with
my combi-boiler. The problem is that the central heating comes on at
apparently random times, outside of the times set by the timer, and at a
high temperature regardless of the temperature settings. This happens
even when switched to "hot water only", i.e. the only way to stop this
happening appears to be by switching off the boiler completely. It
occurs intermittently for say half an hour at a time, but it is a bit
annoying especially now the weather is improving!

I don't have the combi-boiler model description to hand, if this would
be useful I can supply later. Does anyone have any ideas what could be
causing this. To be honest I suspect I'll have to call someone more
knowledgeable than myself out for this, but if I can be armed with some
idea of what's going on hopefully I can avoid any unnecessary expense.
Many thanks in advance,

Cheers
Paul

Paul Graham wrote:
Hi,

I wonder if anyone could offer some advice on a problem I am having
with my combi-boiler. The problem is that the central heating comes
on at apparently random times, outside of the times set by the timer,
and at a high temperature regardless of the temperature settings.
This happens even when switched to "hot water only", i.e. the only
way to stop this happening appears to be by switching off the boiler
completely. It occurs intermittently for say half an hour at a time,
but it is a bit annoying especially now the weather is improving!

I don't have the combi-boiler model description to hand, if this would
be useful I can supply later. Does anyone have any ideas what could be
causing this. To be honest I suspect I'll have to call someone more
knowledgeable than myself out for this, but if I can be armed with
some idea of what's going on hopefully I can avoid any unnecessary
expense. Many thanks in advance,

Cheers
Paul

Is it a wireless timer?

One of my relatives had a wireless remote timer and so did his
neighbour,both remotes where identical and the neighbours was triggering
the relatives reciever in the bathroom and vice versa.
It was pure coincidence that the relatives wife was to talking to the
neighbours wife about it that they happened to stumble on what might be
happening as it seemed too much of a coincidence that both parties should
have the same problem.

Uncanny but true.

Not saying this is happening to you but something wireless might be
triggering it?

--
Sir Benjamin Middlethwaite

The3rd Earl Of Derby wrote:

Is it a wireless timer?

One of my relatives had a wireless remote timer and so did his
neighbour,both remotes where identical and the neighbours was triggering
the relatives reciever in the bathroom and vice versa.
It was pure coincidence that the relatives wife was to talking to the
neighbours wife about it that they happened to stumble on what might be
happening as it seemed too much of a coincidence that both parties should
have the same problem.

Uncanny but true.

Not saying this is happening to you but something wireless might be
triggering it?


An interesting idea, but no, the timer is wired.

Paul

On Mon, 29 May 2006 11:47:32 +0100, Paul Graham wrote:

Hi,

I wonder if anyone could offer some advice on a problem I am having with
my combi-boiler. The problem is that the central heating comes on at
apparently random times, outside of the times set by the timer, and at a
high temperature regardless of the temperature settings. This happens
even when switched to "hot water only", i.e. the only way to stop this
happening appears to be by switching off the boiler completely. It
occurs intermittently for say half an hour at a time, but it is a bit
annoying especially now the weather is improving!

I don't have the combi-boiler model description to hand, if this would
be useful I can supply later. Does anyone have any ideas what could be
causing this. To be honest I suspect I'll have to call someone more
knowledgeable than myself out for this, but if I can be armed with some
idea of what's going on hopefully I can avoid any unnecessary expense.
Many thanks in advance,

Could be a warm start facility possibly as an option or as a permanent
feature.

A tad more to go on than "combi-boiler" would assist.

--
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
Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards

Paul Graham wrote:

I wonder if anyone could offer some advice on a problem I am having with
my combi-boiler. The problem is that the central heating comes on at
apparently random times, outside of the times set by the timer, and at a
high temperature regardless of the temperature settings. This happens
even when switched to "hot water only", i.e. the only way to stop this
happening appears to be by switching off the boiler completely. It
occurs intermittently for say half an hour at a time, but it is a bit
annoying especially now the weather is improving!

Dodgy microswitch on the hot water flow sensor wossname? Presumably the
heat then goes to the radiators, as there isn't any actual flow...


Kim.

Paul Graham wrote:
Hi,

I wonder if anyone could offer some advice on a problem I am having with
my combi-boiler. The problem is that the central heating comes on at
apparently random times, outside of the times set by the timer, and at a
high temperature regardless of the temperature settings. This happens
even when switched to "hot water only", i.e. the only way to stop this
happening appears to be by switching off the boiler completely. It
occurs intermittently for say half an hour at a time, but it is a bit
annoying especially now the weather is improving!

Dodgy frost stat? (possibly built-in, and utilising one of the water
sensors)

Mathew

The boiler is an ALPHA CB24X

kimble wrote:
Paul Graham wrote:

I wonder if anyone could offer some advice on a problem I am having
with my combi-boiler. The problem is that the central heating comes on
at apparently random times, outside of the times set by the timer, and
at a high temperature regardless of the temperature settings. This
happens even when switched to "hot water only", i.e. the only way to
stop this happening appears to be by switching off the boiler
completely. It occurs intermittently for say half an hour at a time,
but it is a bit annoying especially now the weather is improving!


Dodgy microswitch on the hot water flow sensor wossname? Presumably the
heat then goes to the radiators, as there isn't any actual flow...


Kim.

Thanks to everyone who responded. It turns out that it *was* a dodgy
microswitch on the hot water wossname First prize to Kim

Cheers
Paul