Hi,

Before I get an engineer out I suppose it would be nice to have some
opinions.

I came home to find the boiler making just loud whirrrrrring noises,
but without the pilot light on. I power cycled it off and noticed it
had tripped its thermostat, so I reset that too.

Then this happens:

1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

It's a Worcester Highflow 3.5 boiler.

Thanks,

Tris.

On Fri, 27 Jul 2007 11:31:06 -0700, wrote:

Hi,

Before I get an engineer out I suppose it would be nice to have some
opinions.

I came home to find the boiler making just loud whirrrrrring noises,
but without the pilot light on. I power cycled it off and noticed it
had tripped its thermostat, so I reset that too.

Then this happens:

1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

It's a Worcester Highflow 3.5 boiler.

Thanks,

Tris.

pump problem?




--
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

Ed Sirett wrote:
On Fri, 27 Jul 2007 11:31:06 -0700, wrote:

Hi,

Before I get an engineer out I suppose it would be nice to have some
opinions.

I came home to find the boiler making just loud whirrrrrring noises,
but without the pilot light on. I power cycled it off and noticed it
had tripped its thermostat, so I reset that too.

Then this happens:

1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

It's a Worcester Highflow 3.5 boiler.

Thanks,

Tris.

pump problem?


I think I know where you're coming from - water boiling in the erm...
boiler, and steam bubbling up the pipes, because of a lack of water flow?

Anyway, I had the same symptoms at the start of the year (mid winter) -
caused by a build up of sludge in the radiators over the year finally
settling in the heat-exchanger in the boiler, when the TRVs opened.
Resulted in some of the water not being pumped through, and eventually
the cast iron heat exchanger became brittle, bits started dropping off,
and eventually ruptured the HE. New boiler time.

In message .com,
" writes
Hi,

Before I get an engineer out I suppose it would be nice to have some
opinions.

I came home to find the boiler making just loud whirrrrrring noises,
but without the pilot light on. I power cycled it off and noticed it
had tripped its thermostat, so I reset that too.

Then this happens:

1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

For some reason (pump not pumping, obstruction etc) water is not flowing
through the heat exchanger, so it overheats and the OH stat trips out

check the pump out, if that's not the problem, it could be a deeper
problem

--
geoff

raden wrote:
In message .com,
" writes
Hi,

Before I get an engineer out I suppose it would be nice to have some
opinions.

I came home to find the boiler making just loud whirrrrrring noises,
but without the pilot light on. I power cycled it off and noticed it
had tripped its thermostat, so I reset that too.

Then this happens:

1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

For some reason (pump not pumping, obstruction etc) water is not flowing
through the heat exchanger, so it overheats and the OH stat trips out

check the pump out, if that's not the problem, it could be a deeper problem


Get a WB engineer for £200. For that they replace up to 3 "major"
components, which in effect means the component that's failed plus a
couple of others that might soon fail. I don't know whether replacing
perfectly good components is company policy but the engineer we had
seemed to think so. Net result was over £200 in parts and a free next
day call-out, which compared very favourably to a local engineer.

On Jul 27, 7:31 pm, "
wrote:
1. Boiler fires up, as normal... click click... pilot light.
2. Starts to heat the water (hot water from tap)
3. After about 15 seconds, banging noises come from inside. Loud.
4. The pressure gauge rises, and very soon afterwards the thermostat
trips again.
5. Then it does the whirrrring noise which I encountered when coming
into the house.

Any basic ideas? Ho hum

It's a Worcester Highflow 3.5 boiler.

Well, the engineer is here at the moment.

Embarrasingly, bleeding a little bit of air from a radiator and from
the boiler itself has restored full service. But he is checking to
see if there is anything more fundamentally wrong which has caused it
(Fixed call-out fee so I don't really have a problem with that!)

Tris.