hi

I've just moved into a new house (built 1965).

A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

It's not an "abnormal" sound as such, just sounds as though the
heating/water system is active.

My previous house had an old combi wall mounted boiler in the kitchen
- I'm sure this only made a sound when it was actually fired up &
heating.

Maybe it's because the tank / boiler are right above me now ?

Is this normal for a condenser boiler in the attic - or should I get
it looked at (it had a BG inspection prior to house purchase only a
few weeks ago, which it passed) ?

I kind of like complete silence at night !

swayzak

In an earlier contribution to this discussion,

wrote:

hi

I've just moved into a new house (built 1965).

A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

It's not an "abnormal" sound as such, just sounds as though the
heating/water system is active.

My previous house had an old combi wall mounted boiler in the kitchen
- I'm sure this only made a sound when it was actually fired up &
heating.

Maybe it's because the tank / boiler are right above me now ?

Is this normal for a condenser boiler in the attic - or should I get
it looked at (it had a BG inspection prior to house purchase only a
few weeks ago, which it passed) ?

I kind of like complete silence at night !

swayzak

Is it possible that the pump could be running all the time? This could occur
if it was wired wrongly or, maybe, if the boiler controls the pump and there
is a fault in the boiler's pump control logic.
--
Cheers,
Roger
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Is there any chance that your plumbing is linked to a neighbours. perhaps
they are using water at night and the sound is travelling via the pipes.


wrote in message
...
hi

I've just moved into a new house (built 1965).

A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

It's not an "abnormal" sound as such, just sounds as though the
heating/water system is active.

My previous house had an old combi wall mounted boiler in the kitchen
- I'm sure this only made a sound when it was actually fired up &
heating.

Maybe it's because the tank / boiler are right above me now ?

Is this normal for a condenser boiler in the attic - or should I get
it looked at (it had a BG inspection prior to house purchase only a
few weeks ago, which it passed) ?

I kind of like complete silence at night !

swayzak

wrote:
A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

Certainly unusual - can you not get up there in the evening when it's
making this noise and work out exactly where the noise is coming from?

Things to try out - switch the boiler off completely and see if that
stops it; then try turning off the water main overnight.

David

wrote in message
...
hi

I've just moved into a new house (built 1965).

A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

It's not an "abnormal" sound as such, just sounds as though the
heating/water system is active.

My previous house had an old combi wall mounted boiler in the kitchen
- I'm sure this only made a sound when it was actually fired up &
heating.

Maybe it's because the tank / boiler are right above me now ?

Is this normal for a condenser boiler in the attic - or should I get
it looked at (it had a BG inspection prior to house purchase only a
few weeks ago, which it passed) ?

I kind of like complete silence at night !

swayzak

The pump could be wired up wrong and on 24/7, or the frost stat is switching
in the boiler. When in a loft frost protection must be fitted. Some boilers
have integral frost protection. Some put external frost stats in, other put
external stats in to supplement the boiler's frost protection. Check the
setting of the stat, if one fitted, and see it is set too high.

In message
,
writes
hi

I've just moved into a new house (built 1965).

A couple of years ago the owners got British Gas to install a new
Potterton 30L-100L boiler in the attic.

I have noticed at night that there is a constant low-intensity sound
coming from the attic, as though the heating is on - even though it
isn't !

It's not an "abnormal" sound as such, just sounds as though the
heating/water system is active.

My previous house had an old combi wall mounted boiler in the kitchen
- I'm sure this only made a sound when it was actually fired up &
heating.

Maybe it's because the tank / boiler are right above me now ?

Is this normal for a condenser boiler in the attic - or should I get
it looked at (it had a BG inspection prior to house purchase only a
few weeks ago, which it passed) ?

I kind of like complete silence at night !

swayzak

The users guide says that the pump operates for a few minutes every
24hours even if heat is not being called for, perhaps this is what you
are hearing.
There must be a switch somewhere to isolate the system for maintainance,
try turning that off and see what happens.
--
Neil J. Harris